It’s obviously reductive and in many cases unfair.
But there is something that needs to be explained, when Gaza provokes 10x the outrage of Saudi and UAE in Yemen and Sudan, even though the civilian death tolls of the latter are higher and all three powers (Saudi/UAE/Israel) are UK military allies.
I don’t actually think it’s because the Western left consider Yemenis and Sudanese not to be humans.
It’s in large part becuase Israel’s presence in the area (or at all) is seen as fundamentally illegitimate by many or most of those who are outraged.
And that, plainly speaking, is because Israel is Jewish.
From an Arab or Muslim perspective (not all think this, of course) they are Muslim lands. River to the sea. Jewishness is the wound. From the progressive left it’s because they are (ditto, not all think this) European settler colonialists. That’s ethnicity (ie, Jewishness).
An outrage at world conflict that turned on the ‘humanness’ of the victims would look quite different. Gazans are no less or more human than Yemeni, Sudanese, Saudis, Israelis, Druze, Brits, Uyghurs or anyone else. But Gaza has massive extra salience in the Arab world and in the West, yes, because Jews.