Western meddling has fuelled resentment towards the west, you can't deny this.
You realise they've been at it ever since the religion of Islam was born in blood? We had a few hundred years of relative peace thanks to the west having much more superior armies but now thanks to the age of globalisation hostilities are resuming and guess what, they don't need an army. It's a clash of cultures and will continue until one culture achieves total dominance of the other. So while I'm sure it's true that the enemy says they're attacking due to western meddling in Muslim lands, the reality is they'd be attacking us anyway whatever we do. We don't need to change - they do.