Because they've started losing.
Average citizens in Western nations are rebelling against globalism and everything that goes with it, including multiculturalism. Brexit ... the election of Trump ... the grand scheme to dissolve borders and import hordes of Third Worlders is getting pushback from people who believe in national sovereignty, homeland security and the right to determine who gets to enter their country.
The globalists have only begun to realize that they seriously overplayed their hand with mass immigration. Even so, the EU is still trying to tell member nations how many Islamic migrants they have to "share" ... and nations like Hungary are telling the EUrocrats to use their migration plan for toilet paper.
Check this out: https://nationalfile.com/slovakia-bars- ... w-mosques/
Slovakia –- along with many other Central and Eastern European countries –- has repeatedly adopted a hard-line stance against the integration of Islam, perhaps overshadowed by right-populist countries such as Poland and Hungary.
According to Voice of Europe, Slovakia is the last EU member state without a Mosque within its borders. At the inception of the 2015 Migrant Crisis, Slovakia refused a small quota of 200 Muslim migrants. An interior minister, at the time, said, “We want to help Europe with the migration issue. We could take 800 Muslims but we don’t have any mosques in Slovakia so how can Muslims be integrated if they are not going to like it here?”
Former Soviet Bloc nations have a little bit of experience with uninvited foreigners.