Naive Westerners need to wake up.
"Terrorism happens because we kill Muslims in the ME" 
No. 
The ideology of the caliphate runs much deeper.

"All of this (terrorism) falls into a strategy where IS wants to eradicate what it calls the “grayzone” of coexistence. Its aim is to divide the world along binary lines – Muslim and non-Muslim; Islam and non-Islam; black and white – with absolutely no room for any shades of grey.

“The Muslims in the West will quickly find themselves between one of two choices, they either apostatise and adopt the kufri [infidel] religion propagated by Bush, Obama, Blair, Cameron, Sarkozy and Hollande in the name of Islam so as to live amongst the kuffar [disbelievers] without hardship, or they [migrate] to the Islamic State,” says an editorial in Dabiq magazine. “The option to stand on the sidelines as a mere observer is being lost.”

FYI - Dabiq is the IS english-language mag. 

Stop on-line radicalization? 
Sure. 
But there are other tools in the box.