It absolutely is an issue for me, but I realise I'm out of step with most people, who just go 'oh but there's genocide in these places, you're not talking about that' - a weak argument because actually we should be, elsewhere, but the question here is Gaza and Israeli interests and we have a looooong history in that part of the world. (Or it's 'what about the Tories? They aren't doing what you want' - I have zero interest in the Tories, they are beyond caring about.)
I can't support any party that isn't vehemently and vocally against committing war crimes: we are arming a genocide. Those chickens will come home to roost in future decades and I'm ashamed of the UK to be on the side that's going to have to answer to that.
And it's a skill issue: the Labour Party had a problem with anti-semitism, and dealt with it. If the Labour Party now has no politicians who can present the argument that (despite having ignored antisemitism from some members in the past) having a manifesto pledge to stop arming a genocide does not equal antisemitism: that's a problem. It takes nuance in the present media climate, but it has to be done. If they don't, can't, won't, then that's an issue of competence as well as morality and I can't support them.
Ideally we'd be in a situation where Labour was going to immediately implement multiple hard-hitting changes to things like child poverty: our individual (and therefore national) wealth being drained by rapacious fuel companies, supermarket prices ditto, the absolute state of our water infrastructure, the environment. Just for starters and off the top of my head. And yeah they are going to say some stuff and might do some things, might not. That's Labour these days. So if you're thinking I am wrong for not focusing on my own country, well it's because I don't have much faith in Labour currently on that score, Keir Starmer flip-flops all over the place (and he does - it's on camera!). So it's not like it's either/or: either you care about Gaza OR you care about the UK. I think they are a much-depleted and compromised party on both counts.