Okay, but the analogy is a little incomplete. What if the border between US and Mexico was not settled and some Texans were claiming and settling on land south of the Rio Grande? What if New Yorkers had occupied both sides of Niagara Falls and were condemning Canadian businesses and confiscating their property?

I do not see how any attempt to bring about peace can work while there are significant contingents on both sides who are opposed to the notion and are actively promoting conflict.