Who cares if my faith and other people's faith is a choice or not? That doesn't make prejudice any better.
Yes it does. Prejudice against somebody for something they can not control, and which they did not choose, is worse.
But in either case, prejudice can be justified (e.g. I am prejudiced against psychopaths- although it is not a choice on their part, I do not like them because they lack empathy and are by nature only self serving).
Which of these causes Christians to harm people: Loving their neighbor as him or herself, loving God, feeding people and clothing people, loving each other, pray for our enemies.
All of the above cause Christians to harm others.
"Loving their neighbor as him or herself"
Christianity is human-centric, and disregards all other beings as soulless automatons to be used as machines. "Loving your neighbor" is just a red herring which gives the illusion of morality, when in fact one's behavior can be highly inconsistent with legitimate moral consideration for others.
Christians also "love" their human neighbors in terms of their delusions regarding Christian soteriology, which can be more destructive than helpful in any case.
"loving God"
The being as defined in typically Christian canon doesn't exist, and so by loving it a Christian develops an unhealthy egotistical attachment to an imaginary creature, favoring its non-existent interests (as defined destructively) over real beings, and rejecting science and logic when they threaten to destabilize that delusion (the consequences of the rejection of knowledge being ignorance, which goes even further to harm others).
"feeding people and clothing people"
Particularly if done in ignorance, as above, with the rejection of science and logic, and the rejection of the moral value of other beings, this can be a highly destructive act.
Production of food and clothing can be very destructive to our environment, to other living things, and to other humans (economic slavery, etc.).
Again, this creates a sense of false, unmerited moral achievement and gives a Christian license to ignore other moral issues because he or she has convinced his or herself that he or she is actually doing good (when in fact, is probably doing evil out of ignorance of the real moral consequences of his or her actions).
"pray for our enemies"
Prayer is useless- proven so time and again- so to begin with this isn't doing anybody any good.
More importantly, this is a form of self-congratulation that increases egotistical investment into the memetic construct, decreases capacity for logic and free-thought (it actually turns off those parts of the brain and reinforces dogma), and wastes time that could be used to do real good in the world.
It gives the Christian the false impression that they have done something good, while doing something bad instead, thus relieving the urge to actually do something useful and good.
Jesus said those were the most important commandments.
Nobody has any idea what Yeshua said, or if the guy even existed.
But if you're going by actual
scripture, instead of what is taught in liberal churches where nobody reads more than a few selected quotes out of the Christian bible, that's simply not true.
Old testament commandments are still important, particularly the primary ones, and even in New Testament focused Christianity the "Ten commandments" feature prominently.
In Scripture, Yeshua also focuses more on forgiveness of debts and wrongs than on any of the things you mentioned, there is a strong impetus to proselytism including encouragement of real or ideological warfare, and he even preaches against wasting resources on the poor.
Edit: I forgot to address something you asked. Do you honestly believe that all religious people are ignorant of science?
Not all religions; some of them (some of the non-fideistic ones) respect science and logic.
Most of the rest are ignorant of science, all the rest are ignorant of logic.
This includes all Abrahamic religions, most theistic religions, and all revealed religions to the extent they are revealed rather than reasoned.
Vedic religions tend not to be as arrogant, non-theistic Buddhism even less so, with the exception of some schools which reject logic on the grounds of non-realism dogma.
I love science, and there are plenty of people of faith who are scientists.
There are very, very few people of faith who are scientists, and for those who are, they only practice science to the extent they check their faiths at the door when they pursue actual knowledge. Where that religious dogma clings to their world views is where they are blinded to ever learning anything new, and so in those domains they are incapable of doing science- they are very limited, as scientists go, to "safe" areas of study where they don't have to worry about their religious views being challenged. They can be hard workers, but they are not very
good scientists- and they can't be.
People should be judged for what they have done, not for what you think they will do if they follow a faith or religion.
I'm only judging you for what you are doing, and for what you will continue doing.
I think it's not only fair to judge people for doing evil, but it's morally necessary. Peer review is essential to keeping each other in line and improving our moral values.
Rejecting logic is evil, and results in evil. Following from that, rejecting science is evil, and results in evil. Following dogma is evil, and results in evil.
What you believe is good, is in fact evil- I don't think you intend to do evil, but out of a misunderstanding and ignorance believe you are doing good- that is the tragedy of religion.