I suspect because we don't regularly hear of masked armed thugs in Switzerland beating up, sometimes killing or throwing into concentration camps innocent people who were looking to immigrate.

Nothing wrong with making immigration laws strict, if that's what a country wants. That is totall fine.

But there is no justification to beat people up, kill them or throw them into concentration camps. Just tell them no in a professional manner and politely send them back to their own country (also, not some random contry they haver never been in).