There is a nice comment on a Palestinian website about self determination, part of which I have copied below:
There is a recognised right to self-determination in international law..... It is clearly illegal under international law to deprive a people of their right to self-determination by using forcible actions including use of violence.
But I wonder if the Palestinians would apply that logic to Israeli settlers, say 100 years from now.
As someone whose father served in the Falklands I'm no apologist for the Argentinians, but I would say their position is that those living on the islands now are not native to the islands and therefore not subject to the same rights of self-determination that would normally apply.
Like I said though, I'm no apologist and fully subscribe to the notion that, as the Argentines aren't native to South America themselves, they should be careful when throwing colonial stones.