Why do these people care about immigration in Europe? They are obsessed with it.
I wonder/ hypothesise if they are (maybe subconsciously) driven by racism, policies that lack humanity and feel a bit alone and isolated in the way they act.
If they can push the UK to do the same they won't feel so isolated. Targeting eg France or eg Germany and they'll have to learn to speak French or English so UK is easier.
Additionally they are busy, people to kill, genocide to support, etc. so they rely of those in the UK holding similar ideology (far right) to tell them buttons they should push (without them actually understanding any background, context, etc.