Surely you’re aware of the old joke about Star Trek, which is probably at the heart of this discussion about no muslims in Star Trek. Goes something like this...
One night in a bar, a guy is asking his buddy “how come there are no muslims in Star Trek?”. His buddy responds “because it takes place in the future long after they’re wiped out”.
I think the story about Khan was about a genetics war in the 1990s where the world was almost destroyed before Khan and his followers were put into cryo-sleep on a spaceship. Anyway, if there’s a huge world war in our time, maybe all the muslims get wiped out and mankind will then have peace on Earth in the future (well, at least in fictional Star Trek stories).