ending the "forever war" suggests that perpetual war is something that is novel or unusual and that a state of normalcy is a state of peace. well, go hang out with some monkeys and tell me if you think that's still true.
war is like diamonds - it is forever. war is normal; it is a regular state of existence. peace is a hallmark disney cartoon fantasy phony reality that has never existed in history. even in the presence of dominant empires that succeed in slaughtering their closest competitors for a while, which are the periods of history that most closely resemble peace, war always exists on the edges. eliminating the "forever war" would require something like evolving into a different species, or perhaps global communism as a basic pre-requisite. yes, there will forever be war. you silly kids will have to grow up a little and deal with that.
oddly, this term is being associated with a left. what? it is the most basic, blatant expression of the burkean conservative perspective of hierarchical harmony, where everything is in it's right place, that i could imagine hearing articulated. you couldn't better encapsulate conservative philosophy than with the phrase "end the forever war", and liberals and socialists are supposed to make fun of the conservatives for believing in such silly fantasies, rather than interpreting reality through experiment and evidence. marx, particularly, wrote a theory about conflict. socialism is about perpetual war. that's what it is.
so, this is not a left, it's a right.
so, yes, we will have war forever, and we will have war forever until we have communism. you'll never end war without getting rid of capitalism, at the least. these kids aren't even trying to write a theory, here.