The last line of that news article is quite important here. He was also arrested for a harassment charge which if memory serves was more serious than his tweets alone.
Your memory does not serve it seems at least I can not find anything “more serious” with a cursory search.
What does "cursory search" mean to you? Whatever it is, you should considering adding Google or some other basic search engine. Regardless, Wikipedia backs up the truth of the comment you are replying to.