Massacring and forcibly evicting an existing population to create an ethnostate, which then subjugates the previous inhabitants under an apartheid regime, is generally seen as a "not very nice" thing to do. To suggest that territorial disputes can only be resolved through war is unimaginative, ignorant, and flatly incorrect.
Your question is unimportant because ethnostates and the forcible acquisition of territory are always fundamentally unjust.
A civilian population is being brutalized right now. The killing must stop for there to be any reconciliation.