Israel has pretty tight relationship with other western powers, and more specifically the US, and also tries to attract people from said western countries to come to Israel. Whereas the Palestinians are constantly killed and forced to move, and refused a stable home and country. Not sure how you want to create social reforms and progress when you don't even have basic security for living safely. You can only advance social issues if you have the mental bandwidth and means to do so, not by being constantly attacked and bombed for more than 50 years now.

I also don't condition not supporting massive amounts of civilian murder with LGBT rights. These can come after. For now the killing has to stop, regardless.