There is insurmountable evidence that when the majority is Muslim, life gets worse for everyone, women’s rights are stripped away, and freedom of thought and religion is gone.
Quite similar to how if Scientology became mainstream we would all be worse off.
The last sentence hints both might have a common cause whis is not “being Muslim”. I think it might be “being extremist”. The opposite would be a pluralist society, which embraces diversity and encourages respectful coexistence and exchange.
This then also includes the rise of right-wing populists in democracies all over the world, with exactly the same consequences as you said.