Are you seriously comparing the choice a relatively rich Westerner has with someone who's home has been destroyed and has had to flee where they live on foot with whatever they could grab, and confused why the former person is less likely to riot?
Really?
I suppose in their situation you'd just sit there in your tent in Calais peacefully starving and putting up with poor sanitation and just hope help will arrive at some point, because you wouldn't want to to cause any trouble?
Do I condone rioting and violence, of course not but your deliberate ignorance of the situation and symptoms of the trouble, and blatant attempt to use this as evidence these are just generally violent and ungrateful scumbags and therefore undeserving of any help is just asinine....to be polite.
No excuse for violence, ever. Stop being such a pity-party. Sick and tired of people with gaping chests that won't sew them up, you make a mess all over EU with that.