FK: "Sure Christ taught that. Right through Paul. ..."
That's not the only possibility.
That's right. The other possibility is that Paul was not teaching in accordance with what Christ revealed to him, and was therefore in the service of satan! :) I happen to discount this "possibility".
No, not necessarily. The Bible is full of instances where unsuspecting individuals, sometimes unbeknowns to them, serve God's purpose, or for that matter any purpose.
Let's be brutally frank: without +Paul there would be no Christianity. But, by the same token, Pauline Christianity is not the Judaism preached by Jesus Christ.