These men wearing the thobbs may not be qatari after all.

Encountered many of them in my line of work and they are extremely rude. Most if not all Qatari I met are courteous and well-mannered.

The "Man in thobb" that you saw might be trying to impress those around me and like a "rooster" showing off....lol
What you are is what you have been, and what you will be is what you do now. - Buddha