I have had a difficult professional relationship with the some police officers during my career. I'd say that they are a mixed bag, as you would expect.
Instead of joining in this Twitter inspired pile on though, I would point out two things:
1. Police officers run towards trouble when we have the option of running away e.g.:
https://www.bbc.co.uk/news/articles/cvgwdyn4yqvo
2. The Manchester airport incident should have taught us the dangers of making judgements based on one half of a story (and I am being very generous in suggesting that we have as much as a half here).
You should all be saving your energies for the next time Twitter tells you to be outraged. My guess is that will be when the Ethiopian bloke convicted of ***ual assault in Epping gets a sentence that Twitter deems not to be harsh enough.