Frankly, it's not your place to tell people where they can post what.
I didn't tell you where to post what.
Your entire argument is that you're defining what "legitimate criticism" is. Sorry, but it doesn't work that way.
It's actually you who are trying to dictate what others can/can't say. I'll say what I please, you can do the same, and the groundlings can decide for themselves.
You're also appear to be jumping to conclusions about why people don't like it. Criticizing the flag waving because is often because it feels like a lame and uncreative twist, not because people have problems with the US or its flag or what any of it represents.
But the episode wasn't "flag waving" at all. It was doing the OPPOSITE. It was pointing out the hypocrisy of American foreign policy in its conduct of the Vietnam war. (See my other post in which I quote the episode.) It was a radical and subversive message for its times and most likely one which could never have been explicitly articulated other than concealed in a s.f. script.
Hell, I'd still roll my eyes at the end of the episode if they walked in with the flag of India and Kirk read from the Ramayana because springing the parallel Earth "twist" at the end is lame-o.
That's not what you said before though.