It wasn't their land, the Ottomans were just another imperial power.

(I know I'm talking to a wall here, getting you people to think outside of a legalistic mindset is impossible.)

I'm not trying to be specifically legalistic, just trying to see if there is some general principles here that you think apply outside this situation.

You see the rule of the ottomans as invalid, and this all (legalistic) property rights during that period invalid? That seems it would apply everywhere. How are property rights ever established? What does it take to invalidate them?