Sorry about the tone of that reply. My point is that, when it comes to non-US conquests, ethnic/religious cleansing was the norm, not the exception. The muslim states are especially famous for doing that, but they're hardly alone in that.
I would argue that several parties, like, say ISIS, Iran, North Sudan or Hamas/PLA are trying to do exactly that, today. Americans by and large don't realize this is the case, assuming everyone behaves like Americans do, and then don't understand the reaction states/populations have to these "revolutions", or even more ridiculous "resistance". They don't understand that there can be no peace until these organisation have either died or abandoned their goals and most of their identity.
Europeans (and I'm one) act all high and moral, but the last times they did have the option to commit ethnic cleansing, most European states chose to do exactly that. And don't say the allies didn't do that, rather, read about the aftermath of WWII and the revenge killings (which targeted am. And no, at those times the US also had that opportunity and the US chose to not do it, and I do not have faith that they won't repeat those mistakes. Given that I grew up in an environment characterized by US military "dominance" I have to say, I'm extremely grateful for the result of said dominance.
Laser weapons on the US side may provide the option of having the military standoff that has characterized the 20th century last longer. That's a very, very good thing.
I've travelled around enough to know that what Europeans are really blaming the US for when it comes to Israel, for example, is that the US helps prevent the Palestinians do the ethnic cleansing they want to (and others), and prevent Europe from interfering (e.g. with the recent Lebanon war vs. (that was partly a proxy war with France and Iran)).
Frankly this is the reason I'm both a techie but sympathize strongly with the republicans. I don't care (at all) for their social agenda, but I don't really care about social stuff in the US at all, and the democrats have a distinct isolationist streak that the republicans never displayed. If the democrats had their way Europe and the middle east would be screwed. And not screwed in "oops we don't get the oil contract", but screwed in the "another 1000 dead today" sense.
