Your first post and this, for the most of it, are inaccurate. He is mouthy, always has been, but didn't kick off until he was getting pulled up for a throw away remark about a miss placed pass.
No a welsh flag is fine. To be honest I wasn't bothered with the flag but I can understand why others would be.
Again, you are trying to use a one off incident regarding 2 people to reflect another 9 fans who were sitting enjoying the match and encouraging the team.
Well Harry, I would be giving the "2 people" a wee word and give them some sensible advice as they seem to be "tarring" you all with the same brush!