As a corollary: people who, because of geography, are unlikely to suffer any traditional or novel military consequences of a war in country <X> (e.g. Americans w.r.t a war in the middle east) are only going to have moral reasons for avoiding such a war, other than the risk to members of their family and friends. This makes the risks from such countries significantly worse than those who are militarily at risk should they choose to attack another.

Of course, none of that stops terroristic responses to war, but those by themselves affect relatively small numbers of people (or have done so far; obviously terroristic use of nuclear weapons would change that).

We can see all of this in the voices of the segment of the American population that is "all in" for the war in Iran, safe in their belief that they will suffer no militaristic consequences from it.