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Islam suggests ways for a person to gain a good afterlife - Heaven. Christianity does this also. Both religions have a different method for getting to Heaven. The methods are quite opposite, Islam stating that Heaven is gained through doing things, Christianity expressing that Heaven is gained through the things that Jesus already did... if one believes.
Because of how opposite these two religions are in this key point, if one of them is right, the other most certainly is false.
Since, as has been stated, the religion doesn't do or feel anything until it gets into the people, when the false religion gets into people, if it teaches falsehood about the hereafter, it essentially becomes hatred in the people who believe it. Not only does it become hatred, but it is hatred that is not necessarily felt as such by its adherers. Why not? Because it is destroying its own people simply by wrong belief, not by active emotion against others.
There is no salvation for and to Heaven except through the work Jesus did on the cross, and by His resurrection from the dead. Therefore, Islam hates those who believe it because it is working inside those who believe it, the method to send them to Hell forever. How does it do this? It keeps them from believing in the salvation of Jesus, the only way to Heaven.
Everyone dies. A religion of good works for this life is great. But it is not as nearly important as a religion that brings one to everlasting life in Heaven. Islam hates because it is bringing all of its true believers to Hell.
That is such total garbage. You have managed to present only tiny minority perspective of Christianity as the total truth, while disparaging Islam.
Okay, okay. Too many words for you. Let me get right to the heart of what religion is for. Religion is there for basically three things:
1. To show people how to live a good and righteous life on earth;
2. To show people the way to be saved for a good life in the hereafter;
3. To show crooks how to make money off believers.
That's essentially it, except if you want to suggest that some people might use religion as a scapegoat... "The devil made me do it," or "Islam made me join ISIS."
True Islam hates those who join it because it is sending all true Islamites to a harmful hereafter... Hell.
True Christianity loves those who join it, because it is sending them to a joyful and glorious hereafter... Heaven.
A difference between Islam and Christianity regarding the hereafter is, you don't have to be Islamic to go to Hell. You just have to NOT be true Christian.
There you go. This is basically it, except to say, true Christianity is believing in the salvation that Jesus worked, for salvation into Heaven and escape from Hell.