Hmmm. Well its true to say that Christianity might be an offshoot of Second Temple Judaism, so is the modern Rabbinic Judaism of today. Neither are the kind of Judaism of Jesus's day when the rituals outlined in the Torah were carried out in the Temple.
The New Testament is every bit as Jewish as that Talmud--and it was written earlier.
Yep. Christianity was the natural conclusion of what Judaism was always working to. Like the caterpillar to the butterfly.