Extremists like that thrive off of each other. Extremist supremacists and extremists islamic fundamentalists exists in a symbiotic relationship of hate where they both gain traction from the escalation of conflict deliberately caused by their actions.
And of course here is the added factor of Russian influences, as has been proven earlier with Rasmus Paludan, where the intention was very clearly to sow dissent within NATO and postpone Swedens membership.