I can tell you think this is very important so I'm looking for more information for you.
Sure. Why not. I've already studied a ton on the subject.
You seem to be way off base in terms of what Christianity retained of the Israelite practices and beliefs. I can try to find some material about that too.
If the "base" you are referring to is the version of history held by christians, then yes, I'd agree. I believed that "base" for 30+ years of my life, as being a good christian we were expected to. I went to seminary and realized how weak the argument for that base really is. So I really doubt you'll convince me to return to a belief that I already realized was bunk. But again, go ahead. Why not. It won't hurt me to read anymore than reading fantasy novels would.
And about "gentile" Christianity, I'm sure you realize that all of the early churches were founded by the Twelve or their close followers.
Yes. And the early church were Jewish christians, led by James.
Yes they changed some practices, but it's odd to me that you think that's somehow controversial.
Nothing about the early church is controversial. It died off.
Christianity as we know it today was a gentile version of it. The Jewish version of it, that was the original version, disappeared as it was founded upon Jesus being the messiah (the next anointed King of Israel, the one who would rid the holy land of Roman occupation, and reunited the lost tribes). The gentile version was created by Paul, who the early church was not aware was teaching a different gospel. Paul admits he did not get his gospel from any man (including the Twelve or the close followers). From Galatians 1:12, "I did not receive it from any man, nor was I taught it; rather, I received it by revelation from Jesus Christ." Paul had the Twelve and the early church duped into believing he was teaching the same things as them, but he wasn't and got called out on it by the Jewish christians in Asia. Paul even admits, "You know that everyone in the province of Asia has deserted me" - 2 Timothy 1:15. This gentile version of christianity has never cared for any Jewish. Why would they. They weren't Jewish. That's not controversy. It's simply behavioral.
I mean, it was somewhat controversial at the time, but the Bible does a pretty good job of covering that controversy.
Yes, it was controversial while both the jewish version and the gentile version existed. I as well, being a christian, used to believe that the controversy was "settled". But it's quite obvious to me know that the "settlement" was that gentile converts did become Jewish, but since they had never heard the law, they didn't know how to obey the law. So the "settlement" was they could begin obeying 4 of the easiest laws from day 1, and as they hear the rest of the law preached in the synagogue every week, they would grow to learn and obey the rest. The idea that they should be considered law breakers from the day of converting to Judaism was just ridiculous. Hence the "settlement" to quiet those pointing fingers as new converts for being law breakers. Paul however spun the "settlement" into supporting his own gospel, of the law no longer being a burden... his gentile version of christianity that he didn't learn from any man, but got it from visions. He was out teaching this to gentiles in force, until the Jewish christians in Asia called him out on it in front of James and the early church in Jerusalem. He then called on Rome to save him from his fate, and from the point on there is no evidence of Paul and the early church collaborating anymore.
Peter seemed satisfied at any rate.
If you are referring to what Peter said in the books of 1st and 2nd Peter, most scholars have concluded the two books were clearly written by two different authors, and very unlikely that either was written by a Jew from Judea. They were most likely written by someone, or people, from Alexandria, and well after both Peter and Paul had both died.
That said, the Peter reference is really the best, and only, argument for believing that Paul and the early church ended up in good standing. And it's a weak argument at best. The fact that the early church (Jewish christianity) died off when Jerusalem fell and Judea was lost made it very easy for the gentile version to simply claim it's the continuing story of the early church, as there was no one who believed Jewish christianity to contest it given their hope (their belief) was lost when their land was lost. The gentile christians could forge books in anyone's name at that point without contest.
I'm also very curious why you think it matters that Christianity stole practices from the pagans or anyone else. From the fall to the crucifixion, God has made lemonade out of lemons. So what?
Not sure what you mean by "matters". It's simply observance. While Paul claimed to get his gospel from visions, it's pretty obvious where he got his gospel from. He simply stole things from other religions to create it. It's called
Syncretism, and historical scholars know the most active time in history for Religious Syncretism to have occurred was around the time of Jesus, especially by those influenced by Hellenism... such as Paul was.