Some said that folk were obsessed with opposing apartheid south africa too, which led them to ignoring other appalling governments in Africa. Those people were obviously full of shit.
Israel has been an international cause for the left since 1948. It is, particularly since 67, the most notable of the 'arch-reactionary' states still standing. The South African and Chilean regimes fell (in part thanks to international support and solidarity). It is the last of the monolithic reactionary states that are on 'the west's side.' It IS a settler colonial state. These are just facts, the religion of the state is irrelevant to that. It is the most recent state to be established on an explicitly racist manner (a land with no people.....). It would be absurd if Labour politicians and supporters just stopped talking about it, and would be acquiescing to apartheid.