Of course it shouldn't be, however the majority of voters who may have been toying with a vote for the Greens, will more and more start to see them as a bit of a single issue party (a left wing Reform, but with a different single issue).
Unfortunately that single issue is no longer climate change but Gaza / Palestine, and most British voters I suspect either don't care enough or are frankly bored of the subject (no judgement), and have it so far down their list of priorities when it comes to actively voting for a party (in fact it is more likely to appear in the negative column), as to render the Greens as completely irrelevant.