Really? So it is OK for some unknown dude to barge into a press conference of a US CABINET MEMBER, start shouting, and try to push past the Secret Service? The a-hole is lucky to be still breathing.
He was seen as a potential threat. He did not have his Senate security badge or pass. He was asked to leave, refused, started to raise his voice, and tried to move towards the Secretary. At that point, he was a threat and was escorted out.
This was NOT a Q andA session. He could have waited patiently, like a man, until it was over and then asked to speak to Secretary Noem. The fact that he could not contain himself maturely says a lot about his character.