I can't say I really find fault in what they did here. I'm against a lot of the calls for violent and destructive behavior that has become a daily thing on Lemmy, but from a quick reading up on Streeting, it sounds like other more peaceful means have been ineffectual over the last year+.
Reading TBB's info, they seem to only support limited damage of property of specific individuals that are causing them to have lives ruined or ended due to a denial of necessary services for political, not medical purposes. Streeting refuses to meet and talk with pro-trans groups, while finding repeated occasions to meet with extreme anti-trans organizations.
As someone in charge of providing health services to the public, Streeting is not serving the people he is sworn to protect and is actively contributing to their harm. Having a window broken, while properly not a legal response, is still significantly less damaging than what Streeting is contributing to. When you leave people with no legal course of action, then they are only left with illegal means of being heard, so he has made things like this inevitable. That the trans activists are limiting themselves to the minimum of disruption while their people are dying says a lot to their patience and reluctance to cause the same harm directed toward them.
For a successful movement, there will always be necessary a group of people being civil, but also a group willing to go to the next level for making those that want to ignore their peaceful voices and to show people cannot just trample all over them. I won't call it a necessary evil, because I don't think it is malicious and unrestrained. It is simply people becoming more desperate due to a situation they've been backed into.
I was also a bit surprised as someone just learning about Wes Streeting (I'm not UK) that he is an openly gay man who has done a lot to support LG and presumably B, but not the T communities in the past. If it isn't too off topic or inflammatory to get into, can someone give me a brief explainer why he would be anti-trans? I know trans isn't the same as gay, so is this just the male version of being a TERF or is there more to it? If this is just ignorant, please ignore this paragraph.


He's got great taste in animal friends! ๐ฆ