That is very debatable. An earlier post in this thread by Tecniq shared this link
We need to talk about what inspired Salman Abedi's attack on Manchester showing where the roots of Islamic extremism come from and how the West are happy to ignore them so as not to damage relations with Saudi Arabia.
On R4 'Today' this morning it was mentioned that trying to say our foreign policy is directly related to resultant suicide bombings here is refuted as the West were not at war in the Mideast when 911 happened. But I would argue against that as you can take the conflict back further, the attacks on the USS Cole, the Gulf War of the early 90s and ultimately the Mujahideen being created and trained by the CIA to fight the Soviet invasion of Afghanistan. The West meddles and cares not the outcomes.
To me it feels like having a hornets nest in a tree at the bottom of the garden and the foreign wars are us kicking the tree. So we could stop kicking the tree but if Wahhabism was going to unleash this mindset anyway, then the hornets nest was always going to be there anyway. Do you ignore it, or try to remove it?
Yesterday's C4 news showed how fundamentalist Islamic belief is now affecting the law in Indonesia where homosexuals were dragged from their bed by vigilantes, tried without defence and publicly caned. Not sure how any western intervention led to this.