I read your PDF and don't worry I didn't find your reply harsh
But lets go through some of it.
First can we agree that this is a good explanation of what slavery is?
The condition of being legally owned by someone else, or the system in which some people are owned by others
This is from the PDF:
1) Slavery was institutionalised to save poor family from starvation.
Reading Deuteronomy 15: 11 and Leviticus 25: 47 , we see that God says there will always be poor people in Israel. It is a sociological fact that no one can dispute.
So your argument is that "Slavery was institutionalized to save poor families from starvation" This is completely out of context with the actual text, as you make no differentiation between people here. But lets look at what the first verse you link to as proof actually means when read in correct context.
-----------------------
Deuteronomy 15
1 At the end of every seven years you must cancel debts.
2 This is how it is to be done: Every creditor shall cancel any loan they have made to a fellow Israelite. They shall not require payment from anyone among their own people, because the Lord’s time for canceling debts has been proclaimed.
3 You may require payment from a foreigner, but you must cancel any debt your fellow Israelite owes you.
4 However, there need be no poor people among you, for in the land the Lord your God is giving you to possess as your inheritance, he will richly bless you,
5 if only you fully obey the Lord your God and are careful to follow all these commands I am giving you today.
6 For the Lord your God will bless you as he has promised, and you will lend to many nations but will borrow from none. You will rule over many nations but none will rule over you.
7 If anyone is poor among your fellow Israelites in any of the towns of the land the Lord your God is giving you, do not be hardhearted or tightfisted toward them.
8 Rather, be openhanded and freely lend them whatever they need.
9 Be careful not to harbor this wicked thought: “The seventh year, the year for canceling debts, is near,” so that you do not show ill will toward the needy among your fellow Israelites and give them nothing. They may then appeal to the Lord against you, and you will be found guilty of sin.
10 Give generously to them and do so without a grudging heart; then because of this the Lord your God will bless you in all your work and in everything you put your hand to.
11 There will always be poor people in the land. Therefore I command you to be openhanded toward your fellow Israelites who are poor and needy in your land.
-----------------------
This have nothing to do with slavery, its about how you ought to treat your
own people, and help those in needs. Because the Israelites are the chosen people of God and therefore they should help each other.
Then lets take a look at Leviticus 25: 47, again in correct context of the actual text. (I will have to choose specific verses, as it would be to much to quote it all here. But you have to include 8 - 54, so you can go read that in full.) But again who is God talking about here?
Leviticus 25
-----------------------
14 “‘If you sell land to any of your own people or buy land from them, do not take advantage of each other.
17 Do not take advantage of each other, but fear your God. I am the Lord your God.
25 “‘If one of your fellow Israelites becomes poor and sells some of their property, their nearest relative is to come and redeem what they have sold.
26 If, however, there is no one to redeem it for them but later on they prosper and acquire sufficient means to redeem it themselves,
27 they are to determine the value for the years since they sold it and refund the balance to the one to whom they sold it; they can then go back to their own property.
28 But if they do not acquire the means to repay, what was sold will remain in the possession of the buyer until the Year of Jubilee. It will be returned in the Jubilee, and they can then go back to their property.
35 “‘If any of your fellow Israelites become poor and are unable to support themselves among you, help them as you would a foreigner and stranger, so they can continue to live among you. (Notice that this is not referring to slaves!! but people that might travel their lands.)
39 “‘If any of your fellow Israelites become poor and sell themselves to you, do not make them work as SLAVES.
40
They are to be treated as hired workers or temporary residents among you; they are to work for you until the Year of Jubilee.
41 Then they and their children are to be released, and they will go back to their own clans and to the property of their ancestors.
42 Because the Israelites are my servants, whom I brought out of Egypt, they must not be sold as slaves.
43 Do not rule over them ruthlessly, but fear your God.
44 “‘Your male and female slaves are to come from the nations around you; from them you may buy slaves.
45 You may also buy some of the temporary residents living among you and members of their clans born in your country, and they will become your property.
46 You can bequeath them to your children as inherited property and can make them slaves for life, but you must not rule over your fellow Israelites ruthlessly.
47 “‘If a foreigner residing among you becomes rich and any of your fellow Israelites become poor and sell themselves to the foreigner or to a member of the foreigner’s clan,
-----------------------
So this makes a clear distinction between Israelites and slaves. Its not the same. So when you write:
1) Slavery was institutionalised to save poor family from starvation. Then it is simply not what the bible say. It say that you as an Israelite should treat your
own people who are poor with charity and openness and not as slaves. Because they are the chosen ones.
Now since it should be obvious that there is a huge differences in what God means when talking about slaves and Israelites, and that these are two completely different things. I will for now stop going further with what you have written, until you have commented on this. Because if you don't agree that this difference is actually there, then the rest of the verses about slavery makes little sense.
But why do you think God is so keen on making sure that Israelites are not sold or treated as slaves?