There's a lot to learn about Switzerland's attitude towards immigration, including two popular initiatives in the 1970's proposing to round up and expel most immigrants from southern Europe - long term residents included, that were defeated by a relatively small margin (I was a teenager living in Geneva at the time). Furthermore, recent polls show that 1 in 4 Swiss citizens would have voted for Trump, and I'm reading many comments going "Way to go!" about Trump's plans.
As for France, recent electoral results show that the far right is in vogue, and I can guarantee you that the idea of rounding up "the Arabs" and throwing them out en masse is disturbingly popular. Should the charming Mme LePen float the idea, she would, certainly and unfortunately, gain a lot of support.