its pretty simple. after 900 AD onwards the Christians saw the Muslims spreading and in the end we had the crusades for primarily political power throughout the land (as church was now a political entity) and so were the Muslim leaders.
Then came a lul where Muslim culture declined after I think 1300-1400 and west based culture begins rising. There is scaled Islamic terrorism from Inception to 1960s. that is a period of around 1200 years. even from 1960 to 1980, it was confined to Israel by people who wanted their land back more than religion itself. the most media centric terror attack first came on the first attack in WTC, then 9/11, then came the response, media had its new boogey man, The Muslim man, Jokes about the religion specifically to make fun of IT as a religion and followers became norm and more hardline ideas and actions came into play, this coinciding with rise of terrorism
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