@Mollyollydolly
Labour is going down this route for the same reason it recently became the party of antisemites - it believes, rightly or wrongly, that the old Labour coalition of voters who voted on class-based lines (the actual 'Marxist' analysis the Telegraph misrepresents in its quote above), no longer exist in large enough numbers to win an election (see Red Wall voters as evidence).
They have also lost Scottish and Welsh voters to nationalist parties.
So they are trying to appeal to a new generation of voters on identity-based grounds. These voters don't care about the poor or disadvantaged, they care about identity only, whether that's gender identity or a spurious 'anti-Zionist' ideology which entirely coincidentally looks exactly like old-fashioned antisemitism to Jews at the sharp end of it.
Of course Labour's change of tack is a fool's errand, because for every young voter they attract because they agree with their support for trans rights and the male menopause, etc, they lose another older voter (or more than one) who are sick to the back teeth of identity politics and want Labour to get back to its mission of protecting the poor and struggling, and recognising reality, rather than being hamstrung by a collection of blatantly ridiculous (and misogynist and racist) ideologies.
So Labour won't win any elections. And I daresay will continue to slug it out on the far left, fighting for votes with the Greens and SNP on which party can be the biggest ideologues and sound the purest, in embracing misogyny and racism to appeal to the woke few.
Meanwhile the Tories clean up.