Note that once again, the parent religion, Roman Catholism, did not change but merely created a child religion.
though, Roman Catholicism does change all the time. 60 years ago there was no salvation outside the RC Church, but since Vatican II every other religion is supposedly RC in essence, they just don't know it, and are still saved if they follow their own hearts' morals, but will be subject to a long Purgatory (Purgatory itself being something Roman Catholics decreed between 1400 and 1500 after Jesus human-life and ministry).
but i agree that jcl's quotes do not show mutability of Judeo-Christianity.
Protestantism is trying to go back to the roots of what Christianity was before Roman Catholics changed it to be tradition-dependant and conforming to Pagan ideas (if any RCs are here, don't take that offensively -- it's just the general Protestant view of it, and you guys think we're heretics anyway

).
many Christian and Jewish teachers/scholars/rabbis/what-have-you would say that where God is "persuaded" in the Bible, He is just testing those who "persuade" Him. moses "persuaded" God to keep His promise, but God has always kept His promises whether there was someone to remind Him or not.
sending Jesus down was prophesied way back all over the place in the Old Testament, so i don't think much "taming" was done. in the end, His judgement will be just as harsh and unforgiving to those who haven't personally accepted the gift of His Son as it was back in the old days.
julz