So muslims when your ( Isa ) comes, will he kill the unbelievers of islam as it says in the hadith ?

The problem is they are spiritually blind to what God says in the bible, and rejects the bible for the Qu-ran, and cannot HEAR what the Holy Spirit is saying because they reject Jesus as their Lord and Savior. Until and unless they get born again, they cannot understand spiritual things, because the god of this world has blinded the minds of them which believed NOT; and this is the condition of Islam. Even though you present the truth, which you have, they cannot receive it without going against the Qu-ran, which most Muslims will not do. They will be the ones the Antichrist deceives, along with all other false religions. God will draw those who truly seek Him out, and they will be saved, but the rest will have their hearts hardened like Pharaoh, and a strong spirit of delusion will overcome them along with the whole world ( those who are not Christians ). Anyway, you have planted the seed of truth, and God will do the rest. Be encouraged with Isaiah 55:11, because I often go to this verse to encourage myself when it appears no one is listening.