Exactly like that.
I recall a book set in the interwar period of europe, where revanichists were... not welcome in polite society, becuase people realized where the idea of not accepting borders led to, ie "Back into the trenches".
And so the people pushing the idea, were correctly see as bloodthirsty warmongers.
I'm not sure it was accurate. eventually that idea won and there was another world war,
but people SHOULD consider the ramifications of not accepting a border change. IT is a call for war and death.
People really need to consider if that is what they want.
A war between the US and Mexico would be very bad.
MOre bad for Mexico than for US, but still a lot of dead people and sad families.