I'd have to say that Islam is the worst. Worshipping a prophet that is supposed to have married a 9 year old (who he started raping at 6 IIRC) is the absolute lowest of the low. No other religion is that bad.
I have to rank Judaism as worse than Christianity, if only because Judaism gave birth to Christianity as Islam.
I find Buddhism and Hinduism to be somewhat less bad than all three of the Abrahamic religions.
The reality of the matter is that Abraham, Jesus, Muhammad, and the Buddha are all fictional characters who didn't exist at all, but the fictional stories about the Buddha are less bad than the fictional stories about Jesus, which are less bad than the fictional stories about Abraham, which are less bad than the fictional stories about Muhammad.
I have to rank Judaism as worse than Christianity, if only because Judaism gave birth to Christianity as Islam.
I find Buddhism and Hinduism to be somewhat less bad than all three of the Abrahamic religions.
The reality of the matter is that Abraham, Jesus, Muhammad, and the Buddha are all fictional characters who didn't exist at all, but the fictional stories about the Buddha are less bad than the fictional stories about Jesus, which are less bad than the fictional stories about Abraham, which are less bad than the fictional stories about Muhammad.