I guess it depends on your definition of religion. To me, it sounds like a personal religion, even if just one person believes in it. There are any number of religions too small to be included in their list, probably, so they should have an “Other” option, and that seems like the best fit for someone who has a personal set of religious beliefs that do not align with a listed religion.
I agree that both genocides are bad, but I disagree on a few points:
The genocide of Palestinians has been going on since long before October 7. Hamas didn’t initiate it, they just performed a relatively minor act of retaliation which Israel used as an excuse to escalate the genocide.
For those of us in the west, our own governments are supporting the latter genocide. So of course we’re more outraged about the blood that’s on our own hands (in some sense). I think that Russia should be stopped as well, but not sending weapons in support of a genocide seems like a pretty clear first step we should be taking.