Both Donald Trump and Rudy Giuliani were serial draft dodgers. Go to the links. Neither is a patriot. Both are cowards. I use the word patriot here not in its larger sense, but in the narrower one which they themselves so simplemindedly employ. Coward I use in its customary sense.
It may be that both men are aware of their own cowardice, and that this explains their constant fawning (on full and fulsome display at the convention) over big, strong military men. But this is almost certainly not the case. Sociopaths, by definition, are incapable of self-examination.