A real lack of maturity
Whatever you think of the President posting on Twitter, it is sad to see the replies under every single post he makes just filled with obscenity and vulgarity.
F this, F that, MF this, F you, Go F yourself, F-ing MF the other thing.
This is the President of these United States. You may not like President Trump personally, you need to respect the office of the President, and the authority he holds. Plus, it is just low-class and displays a real lack of maturity.
And yes, it was just as wrong when conservatives reacted the same way to President Obama.