This is what you said.
I believe the Bible. Will Islam try to take over the world, yes, it is written, and that cannot be changed. Do I need to worry about it, fear it, or consider it a legitimate threat? In the grand scheme of eternity, no.
Jesus will set up His kingdom and the real fear is missing that. Everything else is simply God working out His plans. His plans are He wants people to fear Him and trust in Him.
What you have said repeatedly is that you do not believe in Jesus, that you are agnostic, and in my view that is the real gaslighting.
If I make a really big deal over the common cold and scare everyone into doing all kinds of absurd and injurious things simply because they are afraid of the common cold, well yes, you can argue that the common cold is real and some people die from it. But in the grand scheme of things it is a trivial fear.
AntiChrist will rule for about 7 years, maybe less. At the moment it may seem like a big thing but from the viewpoint of eternity it is the closest thing to nothing that you can get. A wisp of smoke, a vanity.