When you take a decision not knowing the end reslt of it and whether it would benefit you or damage you. If you took a risk and it worked, it would still mean that you took a risk, which paid of. You can't come and say that if a risk worked, it is not a risk.
The point was, at that times, you wouldn't know who would embrace islam, and if Muhammad peace be upon him was inventing things up, he won't be risking the whole image of islam on one man.
This man (Abu Lahab) used to hate Islam so much that he would go after the Prophet wherever he goes to humiliate him. If he saw the prophet talking to strangers, he used to wait till he finishes and then ask them: What did Muhammad tell you? If he said it’s white then it’s in reality black and if he said it’s night then it’s day. He meant to falsify all what the prophet says and to make people suspicious about it. And 10 years before the death of Abu Lahab, a Sura was inspired to the prophet, named “Al-Masad”. This sura tells that Abu Lahab will go to hell, in other words, it says that Abu Lahab will not convert to Islam. During 10 years, Abu Lahab could have said: “Muhammad is saying that I will not become a Muslim and that I will go to the hell fire, but I’m telling you now that I want to convert to Islam and become a Muslim. What do you think about Muhammad now? Is he saying the truth or no? Does his inspiration come from God?”. But Abu Lahab did not do that at all although he was disobeying the prophet in all matters, but not in this one
Well yeah not all people are good and not all like to live a rightous life.
But being christian yourself, how would you explan that Jesus peace be upon him had enemies who crucified him and didn't believe in his message.
Mercy is so beautiful, but not all deserve it. I find it odd that you as a christian and a believer in the bible would ask such questions.
28:56
Indeed, [O Muhammad], you do not guide whom you like, but Allah guides whom He wills. And He is most knowing of the [rightly] guided.
Here is the reason why the verse was revealed
Narrated Al-Musaiyab: When Abu Talib (another uncle of Muhammad peace be upon him) was on his death bed, Allah's Apostle came to him and found with him, Abu Jahl and Abdullah bin Abi Umaiya bin Al-Mughira. Allah's Apostle said, "O uncle! Say: None has the right to be worshipped except Allah, a sentence with which I will defend you before Allah." On that Abu Jahl and 'Abdullah bin Abi Umaiya said to Abu Talib, "Will you now leave the religion of 'Abdul Muttalib?" Allah's Apostle kept on inviting him to say that sentence while the other two kept on repeating their sentence before him till Abu Talib said as the last thing he said to them, "I am on the religion of 'Abdul Muttalib," and refused to say: None has the right to be worshipped except Allah. On that Allah's Apostle said, "By Allah, I will keep on asking Allah's forgiveness for you unless I am forbidden (by Allah) to do so." So Allah revealed:-- 'It is not fitting for the Prophet and those who believe that they should invoke (Allah) for forgiveness for pagans.' (9.113) And then Allah revealed especially about Abu Talib:--'Verily! You (O, Muhammad) guide not whom you like, but Allah guides whom He will.' (28.56) Sahih Bukhari Book #60, Hadith #295