Probably because you have to have your head shoved up you can to not realize the incompatibility of Islam itself with anything else?
Which of course explains why the Left (at least the bits with influence) in the West wants to import Islam: that they somehow haven’t dissapeared up their own assholes already is only due to their fantastical ability to pull others up into their cans with them.
Certain leaders of the Western and US left are still die hard crypto-commies. They use non commie language to persuade other leftists to do what Russia wants done. Examples: demonstrating against LGN facilities on East Coast US to prevent shipment to Ukraine of LGN (sold as environmental damage); pro-Palestinian demos (to demonize Israel actions against Syria), and others.