To just call this "screaming" is to completely dismiss a real and huge problem. The EU is the idea that countries should fuse into economic areas, but the countries are also individual still. Of course there's a lot of friction.
For example, because Greece was in the Euro, they couldn't inflate their currency to compensate for the fact that they gradually outsourced more and more work to Germany, until they had nothing left and hit a financial crisis because their government couldn't borrow more money. That's not mindless screaming.