Yes. The concept of a thin blue line is not a good way to put it.
While I believe the UK charity was originally associated with mental health of Police officers, it would probably be a good idea to distance itself from the far right American police symbol.
This title is total bollocks.
As for the opinion if the author, I can understand their frustration, but calling for bans and mandates for political opinions, however abhorrent they may be does not work.