you can't fault people for being confused. just because some people in the US have latched on 'cultural integrity' as their new favorite racist dogwhistle doesn't mean that it makes sense at all to anyone else.
its really funny. some people are fighting a fictional war that the 'other side' isn't really engaged in, and they're losing.
the other funny thing is that if you asked someone what the largest threat to their cultural identity is, a lot of them wouldn't answer immigrants - they would be more concerned about the cancerous US style anodyne consumer culture and media as being the most corrosive