Since the very inception of the Labour Party, there has been a battle between the left- and right-wings of the party.
Be critical of Corbyn's leadership, certain policies and some of the antics of the people purportedly within that faction by all means (many on the left of the party would agree with much of what you say, especially about Corbyn's leadership).
But it's ridiculous - and pretty Stalinesque - to create a narrative that only the right-wing of the party has any legitimacy, and any move in direction to the left is a 'takeover'.
If it is to have any electoral success, the Labour Party must be a broad church, encompassing all aspects of the party from centre-left (even centre-right, as in the NuLabour period) to the traditional left.
You, wanting to return the Party into presumably the control of its right-wing, are doing similar to Corbyn has done in sidelining much of the right-wing.
(PS - I wouldn't include Starmer as someone from the left. Within the Labour Party, he's pretty centrist)
For most of my adult life, I'd been a member of no party, involved in various campaigns and politically somewhere between the SWP (my mum was an activist for decades) and the left of the Labour party. I'm certainly not on the right of the party, or a Blairite/Brownite or anything similar. If I recall correctly, I did join after election in 97, but in some hope of having a vote/voice to move the party left, not as a Blair fan. I left after Iraq, and rejoined in 2010.
But it's that background that makes me entirely confident in describing it as a 'takeover', because I know people who have joined to support Corbyn - including family (and went to school with a now very senior figure in Momentum). I've done SWP meetings, I've done the nonsensical paper sales as a 20-year old know-nothing student to 'generalise the struggle' to strikers at Halewood. I've done Stop The War rallies (and posted on here about the strange experience of stewarding one of the biggest marches against the Iraq war). It's the same people. The reason for institutionalised anti-semitism within the party now is a direct result of that part of the left elevating the Israel-Palestine issue above all others. The complete mess that comes with the word 'Zionism' and being 'anti' it.
The Labour party is indeed supposed to be a broad church - and it should be broad enough for 'Zionists' (the self-declared Zionists, not the subtly different definition imposed by the anti's, of which I was once one) as well as those highlighting the rights of, and crimes against, Palestinians. But the party has been taken over by a grouping for which that single issue is the primary - almost the
sole - issue on which someone's political integrity is to be judged. It has become such a fundamental fault line that anything and anyone who is on the 'right' side of that line is accepted and defended - hence the descent into 'real' anti-semitism, as pro-Palestinian Islamist extremism meets anti-American banking and shadowy cabal conspiracies. But they're all on the 'right' side of the only issue they care about. If a 'friend' who is politically sound on the issue paints a more than slightly dodgy mural, any attempt to remove it is obviously to suppress his views on the rights of Palestinians. Right.
So yeah. That's what I meant. I still regard my views as 'left wing', though I'd prefer something a bit more modern and relevant than nationalising the energy companies and the railways (both policies that strengthen specific union allies of the leadership, far beyond their political/social/economic value as 'left wing' policies). On general issues of tax, economic policies and protection of the welfare state/health/education, I'm still plenty left wing enough. I'd just like it to be a bit more competent, a bit more nuanced, a bit less shouty and a bit less... well, a bit less SWP. Less social media bombardment of the 'NEC slate', where 'democratising the party' actually means giving them a list of people to vote for to prove you're a good lefty.
Just recalled, as a young SWP/left-of-Labour political geek in Leeds, John Trickett was a right wing leader of Leeds City Council who enacted enormous cuts, gutting the public/voluntary sector (and inaccurately blaming 'dodgy accounting' in doing so). Now he's a Corbynite loyalist and useful thicko within the shadow cabinet. And yet he's now an example of what a 'good lefty' should support?