Upon what are you basing that conclusion?
Is it not possible that he did *exactly* as you stated above, yet there were still "concerned" parents whose panties got all bunched up? Just because some are either unwilling or incapable of understanding the message doesn't automatically mean he did an inadequate job of delivering the message.
Again, based upon what?
Based on the fact he pissed off enough people to make national news.
What other ways do you think he could have handled a lesson on symbolism other than offending his students by desecrating a flag? I can think of several. He chose to desecrate a flag, and he failed to communicate it in such a way as to deliver the lesson without blow back.
If I appear to be ignoring your posts, it's probably because you are on my ignore list.