I remember this episode, it happened about a year ago, Green Bay went to play the Dallas Cowboys there.
Sheriff Clarke is a Cowboys fan but he was the Sheriff of Milwaukee, anyway, the altercation happened I believe mostly outside the plane boarding for the return trip to Wisconsin, I'm sure there is plenty on it.
From reading the tweets, I don't think that's really a threat, maybe one could make a case it's harassment.
So, one can research it for themselves, I guess the Deputies came upon the plane when it landed in Wisconsin.
But I've read the original story, one can call this young man a snowflake but the original story went something like all he said was "Aren't you Sheriff Clarke" and then, there was some sort of misunderstanding, the young man was a Packers fan.
Green Bay did win that game btw.