Exactly, those things happened to your country, and we are trying to prevent as many plots like those from ever happening in ours again. @Howe, those in the south who have those capabilities dont have the intention of bombing a civilian populace, or else the NSA or FBI would get them (they have been). Likewise, ISIS do have the intention and have blatantly stated their intention to attack America and its allies. By doing nothing, we only increase the risk and give ISIS the time to prepare and attack our homeland, and we also definitely increase the amount of other terrorist cells who see we would not be doing anything, to emerge and inflict harm. You can be pacifist about it like Ron Paul, but at the end of the day a majority agree it can only come through action and force, which will instill fear, obviously more hatred and vengeful behavior, but all in all will reduce the risk of those jihadists attacking America or even any other EU country. Even most American Muslims support destroying ISIS, as most dont even consider them followers of Islam, but radical extremist lunatics who misinterpret the religion they are attempting to follow.