It's much safer to pontificate on the evils of the past than challenge present evil, especially given the sponsors of Islamism, such as Saudi Arabia, are very wealthy and influential.

There is also the association, in the West, of Muslim terrorists with immigration (as Islamist terror attacks in the West have largely been committed by immigrants). Many in the media sympathize with the ideal of open borders and focusing on Islamism is seen as potentially undermining this idea.