1. His tone. He's snarky and angry and lacking in grace. He's an easily ruffled pit bull of a man. He's not a man in full. He's not a man with much ego strength. He's weak, and his tone -- the petulance, the meanness -- is unbecoming of a United States senator, and in times past candidates would have been embarrassed to address a potential constituent this way.
2. His dishonesty. Tommy, who raises a good question but does a poor job on the follow up, didn't ask this question because El-Sayed is Muslim. He asked this question because El-Sayed has family, starting with his mother, affiliated with the Muslim Brotherhood. El-Sayed wants to turn this into race, and that should make voters wary. Race is the province of the stupid and the guilty and the politically unimaginative. It is what you resort to when you have no cards left to play.
This video is proving to be quite the political Rorschach test.