Is it me, or is Donald J Trump a very immature man ?

Did you see that speech he just gave at the United Nations meeting. It was awful ! I saw it and I was thinking to myself. You have got to be kidding. This isnt a cartoon,
Mr President. This is real life. He was so unpresidential. His own staff was holding their heads down in shame.
Look at what we have done to ourselves America. This is sad. ☺