You don't think Americans losing their participation refusal veto on military action (if they won't do it, the government will hire foreigners for it - whatever "it" may be, foreign invasion or domestic suppression) is dangerous?

The only way I can make sense of your attitude is if you believe wanting to get US citizenship, and being willing to join a military (from their point of view a foreign military) is a sign of virtue, and only good people would do it.