Gentlemen:
Even if I am alien to this discussion, and my country lately has a record of international defection (shaming at least half the voting population), and we are not the superpower USA is, I'll throw my view: most democracies have in their Constitution (the Law of Laws) something like this (from our own Constitution, voted in 1978 after Franco demise):
Section 2 Rights and Duties of Citizens
Article 30 [Military, Civilian, Emergency Duties]
(1) Citizens have the right and the duty to defend Spain.
(2) The law shall determine the military obligations of Spaniards and shall regulate, with all due guarantees, conscientious objection as well as other causes for exemption from compulsory military service, and it may, when appropriate, impose a substitute social service.
(3) A civilian service may be established for the accomplishment of objectives of general interest.
(4) The duties of citizens in cases of serious risk, catastrophe, or public calamity may be regulated by law.
According to dictionary (Webster's), a patriot is "one who loves his or her country and supports its authority and interests". So people that refuse the draft is obviously not prepared to fulfil their duties with their Country, does not support its interests, so I believe is unpatriotic. The fact that politicians are corrupt and inept, and lead countries in an unpatriotic way, is a different issue...
Interestingly enough, back in the day, if during the military service you show exceptional motivation, performance and leadership, you get what is called "licencia absoluta", so you were allowed NOT to go to war if mobilized. I suppose that this regulation took for granted that we would volunteer anyway
PS: since some of you -including projekt- can read Spanish, find below the first paragraph in the source language, sounds nice to me:
1. Los españoles tienen el derecho y el deber de defender a España.