it's not like the talmud is a singular, goaled document. it's a collection of the musings and theories of disparate rabbis. it's like a research periodical. it's like someone wrote down the sermons of a bunch of christian preachers and put it in a book. now, one preacher might be baptist and one might be episcopalian and no one will agree that they are both right, but it might constitute the church government once the topics have become so old that they are no longer controversial.
that is not precisely determined. he did not list out his personal practices. further, he is the one responsible for ignoring dietary restrictions and downplaying the covenant of circumcision. but he does make it a great point to address other "abominations". it is not only modern christians who pick and choose the laws they choose to enforce.
the problem is that the old testament doesn't require salvation. it requires faith and trust. the lord does not demand sacrifice. the old testament describes a few people as being perfect and righteous. these are noah and david and some others i believe. these particular individuals are guilty of sexual sin but not of any codal law so far as the word lists. and yet god describes them as perfect. why? because they loved the lord wholly and trusted him unquestioningly always turning to him when they discovered themselves in error or in trouble. and yet christians are so very concerned with sacrifice and perfection when the listing of the christian creed is that all you are required is love and trust. i find it all very disturbing and continously more off-putting.