I do expect public servants - particularly MPs - to be able to discuss issues without using the puking emoji or suggesting people are lonely. That applies to any MP.
It's just odd & immature. But, as it is the season etc, I will point out there are plenty of Conservative MPs that wouldn't resort to name calling & emojis.
I can't imagine David Davis for example (similarly a veteran and someone whose politics is largely far from my own) posting similar.
I suppose Mercer would call me a bedwetter for expecting articulate, thoughtful responses.