I agree that there's a ton of parallels between now and the period just before WWI (e.g. I've only recently realized how much a tangled web of alliances the Middle East / North East Africa is).
But of all the parallels that could exist, I really think the "men aren't manly enough" attitude we see today / saw them is not a good indicator of us heading towards the next world war. And even if you think it's a good one, I also think there are just way better indicators, to the point that recruiting propaganda trends aren't going to be a major contributor.