Yes, Abraham was a bitch, like so many people pretending to be pious are. Difference is he was much more effective at it. You don't get to be king bitch without some effort, that's for sure.
Circumcision predates God's commands. It was part of the mating ritual of ancient Jews to make the penis look constantly erect and ready to go. All the cleanliness stuff came later when they forgot why the hell they were cutting their dicks and to make Christians stop laughing at them, the same with kosher, which was traditionally a corruption of Hellenist medicinal practices through the filter of tribal ignorance.
Also in ancient Israel, the mohel would fill his mouth with wine and suck the penis of the circumsized so that the excess blood is drained off.