Firstly I will say, Why Would not accept Islam?
Islam is the religion named Islam because of its action (submit to Allah) Islam means Submit to Allah and this is an action you can see in all other religions like Christianity (isayat) named by his God (whom we call prophet Jesus (isa). And Hindu came from the Hind.

So Basically, I want to explain that Islam is first unique by name then secondly Allah says in the Quran: If there were therein gods beside Allah, then verily both (the heavens and the earth) had been disordered. Glorified be Allah, the Lord of the Throne, from all that they ascribe (unto Him).

If you understand this verse with your logic and mind you easily understand that Allah says that it is impossible to have More than one God if it would be then One would say now will be night another one would say no, now will be rain.

Thirdly the way Christ made a son of God and they think that he is also dead. I mean are they serious how can they say their God is dead? Just unbelievable things they say.

Allah has no nose no body, he is clean from eating, sleep, help. Even we are in need of this stuff.

That’s called a true God!