Big difference between the Vikings plundering and the mohammedans.
The Vikings came, made their brutal and bloody raids ... then took their plunder and left (with the exception of some settlements in the British Isles).
The mohammedans come legally, are given free housing, medical care, food, beverage, stipend and legal representation (all free).
THEN they rape, pillage, plunder and murder ... and get defended from any backlash by the police force, wh8ile still receiving all of their freebies.
Big difference, I would say.