People start to adapt the ways of Jews with no understanding, and they adhere to a dietary law, and they observe special days, and then they are glad the American doctors circumcised them when they were born.
You have fallen from grace and do not understand what Christ did and why.
According to the Law if you are not circumcised you are not to observe Passover with Israel. Many people learn about Passover anyhow without necessarily being circumcised or wanting to be circumcised. There is much truth that can be learned from God's Law, including Passover. If the Law has not been abolished, is it still required for those who are of Israel. This is a serious consideration. That is, does the Law, in not having been abolished, only point out a person's sin? Or, is it also for our obedience?
Being circumcised does not necessitate that you observe Passover. You can be saved without observing Passover even if you are circumcised. Passover is about more than learning spiritual truth. It is about obedience among the people of Israel. It is about obeying God.
I believe Passover can even be observed after the destruction of the second temple, though it is not the same as when the temple was here.
Many believe God did away with all of that.
But the discussion about if the Law has been done away with can simply be about God's commands and not commands specific to Israel like Passover, though this can be a part of the discussion. That is, some might say what about the Ten Commandments? Are we still to observe them or has the Law been done away with? Or any other of God's commands. Many are opposed to the festivals, the feast days, etc.... It is these that speak of Christ.