Acts 21 gives us much food for thought concerning how both Jews and Gentiles perceived the message of salvation. The Jews who believed in Jesus as the Messiah felt very comfortable in still following the Law. The Gentiles were instructed not to follow the Law when they became believers, but were given guidelines.
This truly challenges what took place 300 years later up to today. Jews were forced to give up the Law and become "Gentile Christians" while the Gentiles in the last 50 years have disregarded the guidelines of the early church to pretty much relegate any obedience to God's laws as no longer applicable.
Why? And what does this mean for today?
