The EU is comprised of and led by spoiled, sissified pussies who are afraid to tell their constituents that they may have to suffer a little bit in the short term...
Seriously? That is a very dishonest shortcut with no perspective at all. The reality is that europe has been the theater of the largest wars of modern history, some 6000 miles from the USA. Needless to say, the US territory never ever felt any threath upon its population.
Lets start with some numbers here, numbers only account for military losses.
WW1
estimated total death toll: 10 millions
estimated USA death toll: 116 000
WW2
estimated total death toll: +60 millions of which 28 millions for the USSR army, the biggest war sacrifice ever, it is said that, by including civilians death, the USSR lost 10% of its population!
estimated USA death toll: 416 000
Now at the end of both wars it was naturally established, that all european countries economy we're a total wreckage. The only economy that showed growth was the american's, due to the ability for the military industries to react and jump on the opportunity to expand. In the USA. The equation war= business took a major turn right there.
Europe was left counting and burying their death and planning to rebuild. USA saw another good opportunity to "help", sending equipment, material, manpower etc. Remember, nothing comes for free in this world. So they bargain their help for more access to european market and other stuff and also supplying ($$$$), lots of weapons and other military equipment to rebuild europe's defense.
So are europeans just a bunch of sissies? Maybe they are just more aware of the real price to pay when it comes to major conflicts going on in a high population concentration. They have much more to lose than you can imagine.
As for the USA, war is still business and strictly business. Forget about defending liberties, democracy, civil rights. That is all bs to justify the ongoing of a well implanted politics/industry association that seems to fill everybody's pockets.