stopped the animal sacrifices? even according to your writings in acts Paul didn't even do that. upon his arrival in Jerusalem before being arrested you'll remember he shaved his head and took the vow of a nazarite. which includes sacrificing a couple of turtle doves according to Torah. he did claim to be Jewish don't ya know.
Paul is a human being. In his moment of weakness he could have reverted to the old animal sacrifice rituals (they were going on for centuries and were an integral part of Judaism, the NT is full of examples of Apostles attempting to backslide to the barbaric rituals found in the Tanakh and described in the Torah). Old habits die hard. The bloodbath that went on in the Temple was legendary. The heave offerings (with each priest holding a severed part of the animal), the squeezing out of the blood from the offerings heart and spraying it over the alter. I’m sure God was pleased.
True, the animal sacrifices didn't stop until the God-ordained destruction of the temple occurred in 70 AD. Interesting that it hasn't been rebuilt in the almost 2,000 years since. ;)