It infuriates me every time that I see Blair given publicity by the mainstream media and how he's still involved with international politics - especially the middle east/Israel. I did declare that I would never vote for Labour until they got Blair tried for war crimes (have voted for Greens since though most years that has been wasted as I live in Bristol which was a strongly Labour area).
Blair was accused of misleading parliament over the WMD claims and there was a limited attempt to impeach him: https://en.wikipedia.org/wiki/Parliamentary_motion_to_impeac...
Also relevant with regard to war crimes is this recent uncovering: https://www.theguardian.com/uk-news/2025/dec/30/tony-blair-p...
(There's lots of various opinions given about Blair which are not really authoritative, such as: https://www.standard.co.uk/news/politics/tony-blair-iraq-gov...)