Yes, I am not going to get into the Celtic v Rangers thing, but it does seem like they started supporting Israel just to be different to Celtic as you are in favour of Palestine.
By the way my own take on Israel-Palestine is a moderate one. I tend to take a moderate stance on some topics and I tend to be a humanist, and I think in the sense there are innocent and guilty people on both sides. Those innocent people just want it to stop. But I think about it in those terms. The Rangers fans who support Israel haven't considered why and, as you and I say, it seems basically like a 'you do this and we do the opposite' sort of thing. It is very childish.
The Union Bears do seem like horrible scumbags, and many of them seem young, yes. It's really not on that they're not being charged with stuff, or at least banned from Ibrox for life.
As for me, I am not religious. I don't care about Protestant, Catholic segments of Christianity, or Islam, or anything. I flit between being agnostic and atheist depending on how firm and bold I am feeling at a certain time. I have no problem if someone finds solace and meaning in religion. But the religious hatred among the Old Firm fans is something I don't understand, especially as many are non-practicing. It's just awful that it is happening in the 21st century.
Celtic fans have a lot of problems too in that sense, but I would agree that Rangers fans are worse in general. But maybe that's because I lean a bit left of centre in some issues and definitely nowhere near right, so am repulsed by many of the things Rangers stand for.