I am getting the compete opposite side, on average. Although Western states are very pro Israel, everything I read on social media is pro Palestine. On the street even more so (across a lot of countries).
They're not, you're simply misinformed. The US and Germany have been. Countries like Ireland, Spain and Scotland have not. A lot of others have been somewhere inbetween, often as weakly-held beliefs. It's been very low on the list of priorities for people in country like Belgium, they might have been nominally pro-Irsael, but without caring particularly much. Now that Israel has been genociding for a year, except for those first two almost every Western state is largely pro-Palestine.
Unless you're purely talking about governments instead of the populace, but that makes no sense in this context of talking about social media.