You're 23, in favor of the war and you refuse to enlist. That makes you a slacker. Whatever you're trying to prove with your absurd analogy, you're still a slacker. Here's your question and an answer:
When I advocate Clinton being arrested for his crimes, should I "enlist" as a police officer, so as to not be a hypocrite"? No, you're just in opposition to the president on that subject. One doesn't have to be a cop to want to see justice done. One does need to be willing to serve in the armed forces if he's fit, or he has no standing to advocate that other young men go and fight the war he wants. The chicken hawk routine is for old men who can't get into the armed forces. Young men playing at that game are hypocrites.
Our military is such that it does not require FULL enlistment of all it's men under 25. Our situation is such that the roll is adequately filled by those that volunteer.
The analogy was just. I will try an even better one. What if I want a crime boss taken out? How dare I suggest that police risk their lives taking out a proven crime boss when I don't enlist into the police force? That is the equivalent of what you ask.