Nobody is going to nuke the arabs, when people say that, it is either they are jewish, or they believe in jewish propaganda. Israel has been pushing this agenda or years. There is something called ISIS, an Islamic State, that organization is sponsored by the United States. This very moment United States is air dropping guns and ammunition over Syria to ISIS. Besides that, ISIS is being sponsored monetarily. Target has always been control in the middle east, Russia, and China. Idea is very simple to understand, natural recourses. When countries are at war, or at least economically or politically handicapped, it is cheaper to get natural resources. That is in general.
Obviously any war creates refugees, such as the case with Syria. They'd stay home, and live well, if not the prospect of mass execution by ISIS. Obviously any group of people would have all sorts of people, that is obvious and in addition to the fact of a different colture.
Europe is not ready to accept anyone, because they are poor - prices there are high.
In political sense, Europe in general supports ISIS through bringing down of Assad's regime. Yet at the same time they don't want the refugees. It is called eat your cake and keep it too. Real useful work is doing Russia at the moment, through precise tactical air strikes - Syrian army on the ground is directing the air strikes. Everybody else is doing the excact opposite and creating refugees.