If the specific ethnic group is famous for bloodletting and beheadings, what’s wrong with kicking them out of your country?
Actually Geert Wilders doesn’t advocate kicking them all out of the country — but he certainly does in regards to the criminals. If they commit crimes then they should be deported.
Geert Wilders doesn’t say that they should not live in the Netherlands, but he does say that they have to “assimilate” - learn the language, get jobs, not be on the dole and be law-abiding. If they do that Geert Wilders has no problem with them being in the country.