Organizations like Grey Wolves deserve a crackdown and their members deportation.
If they love their neo-Ottoman sultan so much, they should enjoy the great Peace and Prosperity he built in Turkey proper, including the Glorious and Strong Turkish Lira. Not live among the unbelievers and pay with their dirty Euro.
Membership in Grey Wolves should be considered on par with membership in neo-Nazi structures. No reasonable country would suffer foreign neo-Nazis building structures right under their noses.