Mitspa, I'm not sure where you get your ideas...but it seems like you read and listen to nothing but satire news.
Paris had a terrorist attack. 130 people died and the over 350 injured.
The US had a terrorist attack 14 years ago and it killed over 2,500 people...
You're worried about Europe?
Unless you haven't been paying attention, France has stepped up security measures in a BIG way, and the rest of Europe is doing so too. Just like America did too. I very much doubt that anything will happen to Europe in the way you envision. It has survived WAY more than the US has when it comes to invaders, such as WWI and WWII, which happened on it's own soil.