How else can it be interpreted? It doesn't appear that anyone here thinks the S-n-S flag burners are protesting about democracy. They aren't burning the Bald Eagle (is that the correct name for the US Govenment flag?) so one would assume they aren't protesting about the president or the government as such.

It seems that they are protesting about the US, how it behaves and/or its policies.

You say "some people". What if it is the majority? From earlier posts, I understand that the US goverment can't currently deport for flag-burning. However, I guess a new law could be introduced if there was a majority consensus.