The Muslim population of the world does not exceed the Christian population by any stretch of the imagination.
Speaking about the USA ... there are people who call themselves “Christian” simply for being “born in the USA.” Nothing could be further from the truth.
Then there are those CULT GROUPS (two major ones in the USA are Mormons and Jehovah’s Witnesses) who are PERVERSIONS of Christianity.
SO ... the numbers of real Christians are far far lower than some of these statistics say.
It doesn't matter how many there are. The only thing that matters is how many of them are willing to fight.