A few things that I don't get. Maybe someone can explain them to me?
1) Today, the second day of Rosh Hashanah, my Rabbi made a sermon on how Judaism and Christianity, and Islam (only touched on this) were all related, and all "children of Abraham". So then, why so much bloodshed between the three? I mean, siblings don't hate each other that much, do they?
2) Days of rest reflect a purely business motive. Judaism came first, with Sat. being the "day of rest". Christianity came around, changing the day of rest to Sunday. Islam also came around, and it's day of rest is Friday (from what I remember, please correct me if I'm wrong). This shows religion being shaped around the economy, which if you ask me, shows that man is more powerful than God(s), no?
3) Much of Christianity used to deal with the Earth as the center of the universe. It was blasphemy to consider otherwise. Heaven and Hell can't exist as physical planes of existence in this universe right now, because there's that whole thing called outerspace, and Hell can't exist under us, because that'd mean each planet had it's own individual Hell (or something like that).
There's some more stuff I've been thinking about, but I don't want to cause too much of a ruckus

.
Remember, this isn't out to hurt anyone, it's just some questions I have regarding religions, also kind of why I don't exactly believe in everything I hear in Temple. Those three questions by themselves are enough to shake my small amount of faith in religions as a whole, but I'd like to see how some other people view them.