Don't be so hasty.This approach could really offend those
with whom you are trying to gain favour.
Consider your allies in the Western Isles. Uspak is the grandson of Somerled. Encourage his support by granting him more land and power. Flattery will be sure to win him over.
Whichever way you look at it, you have rightful control in these regions. People must accept this. Magnus Barelegs made a fair deal with King Malcolm of Scots (even if the Scots disagree on this finer point). Anyone who refutes this is wrong.
Which card will you play?