Islam is the fastest growing ideology. It’s not a religion because it doesn’t pertain to one individual as much as it does for the world. It’s about imposing Sharia over all peoples of the earth.

Also, Islam teaches that any child born having never heard of Islam is still an apostate of Islam.

Not exactly a religion. The reason why it should never be brought up except as a threat because it is contrary to western values and western society. Much like communism during the Cold War period.