You misrepresent their policy, then call them crackpots, so you're not in good faith, so there's literally no point trying to refute anything you say because it's not based in reality.
And there it is. Global islamist politics. Genocide happening in Gaza comes directly back to us (And America). - Starmer is actively supporting an actual fascist government in Israel with weapons and recon, so he's fair game where regards 'point scoring' or as it's otherwise known, the truth!
I see your views as evil, and you are responsible for your views, so you are again, souless, selfish and myopic.
I've answered why they leave above, from a view of someone who's worked in the sector. You're completely wrong.
P.S. - We're owned by Global Islamists. That must stick in your craw a bit, as it's not palatable to you.