Therefore I say to the Israelites, "None of you may eat blood, nor may an alien living among you eat blood."
"Think not that I am come to destroy the law, or the prophets:For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law...."
You are referencing only the Old Testament. We also have the New Testament.
Yes. This is a part of the wholesale lifting of various dietetic prohibitions dictated by God to the Jews.
Christ authorized the Church to “bind and loose” in these matters. This is the fulfilling of the Law He spoke about.