Indeed for that matter, anyone or organization that stands up for their own culture and identity, as well.
Quite what exactly it is they find extreme about the fact that millions of people, who at least have some degree of common sense in simply wanting to know who is entering their country and control it, is frankly bizarre.
Similarly, the notion that to advocate and defend indigenous culture, or that the intellect of people who care to consider the oppression and dilution of their own culture is somehow 'far right', is also somewhat curious.
Nothing out of the ordinary about any of it, I would venture; let alone extreme.
It is an entirely legitimate, eminently sensible and widely held position to hold.
Just because we're not all deranged, bleeding heart, p.c. liberals, craving unlimited immigration and open arms, welcoming the crazed belief system of Islam and for some unknown reason, desperate to group hug Muslims unquestionably, doesn't mean a jot; it certainly doesn't make anyone a bigot.
What's more, given that the definition of 'bigot' is someone who can't stand the opinion of other people, the mere suggestion that it is anything otherwise, is plainly the work the real bigots.