A few countries in Europe ban face coverings in public. Mainly driven by fear of people wearing burkas.
(No idea if this was accurate or a colossal misunderstanding of how things work, but the claim was made).
France 2011 https://en.wikipedia.org/wiki/French_ban_on_face_covering
Denmark 2018 https://www.dw.com/en/denmark-bans-full-face-veils-in-public...
Austria 2017 https://www.bbc.com/news/world-europe-41457427
etc
When exactly do you think 'Muslims appeared' in Europe?