I feel like this would be a solid 4D Chess Strategy. White Nationalists pop-up in "solidarity" with the Muslims by also converting to Islam. Then, the new White Muslims start conversing with their non-White Muslim brothers about how best to make UK more of a Muslim country. Then convince the non-White Muslims to start promoting more traditional Islamic Values/Beliefs in the UK, while the newly converted White Nationalists merely show support for their Islamic brothers.
Could be entertaining.
I am also going to add look at the ISIS vs Taliban conflict. They are completely happy slaughtering their own.
They have some interesting ideas but they are not friends of the West and we should not take that direction.