Because it is a dangerous and radical ideology which kills and destroys anything that gets in its way as it seeks global domination....much like Communism.
exactly
THE TROJAN PIG OF ISLAM:
The fascist ideology of Islam has religious, legal, political, economic, social, and military components. The religious component is a beard for all of the other components.
Islamization begins when there are sufficient Muslims in a country to agitate for their religious privileges. When politically correct, tolerant, and culturally diverse societies agree to Muslim demands for their religious privileges, some of the other components tend to creep in as well.
https://themuslimissue.wordpress.com/2014/01/15/muslim-demographics-explained/