General Wesley Clark (US Army Ret.) was trashing John McCain's wartime service as "just another fighter pilot". And stating that his service in high command was far more relevant to the task of President than McCain's.
I served too. I was on the flight line, a junior avionics officer, supervising my men every morning. I saw the pilots man their planes, strap in and take off every morning. Same pilots, day after day.
Flying combat into North Viet Nam was incredibly dangerous. My wing lost a plane a day, for the first 90 days I was on base. As each pilot strapped in and lowered the canopy he knew that someone wasn't going the make it back that day. And it might well be him. The pilots of those lost aircraft either died in their aircraft from the impact of SAM's and ground fire, or died during ejection, or were taken captive by the North Vietnamese. Captivity was brutal, and long lasting. A very few, very lucky, fliers were plucked from the jungle by rescue helicopters before the North Vietnamese got to them.
Knowing the odds of death or captivity were high, the air crew kept on flying. So, call McCain what you like, but remember that he was brave. Brave to fly the missions in the first place, and brave under enemy captivity.