Since the Passover is to be observed forever shouldn’t we be observing Passover today?

The statement of the Passover being observed forever is always directed to Israel, in the times in which God is dealing with them as a nation – Exodus 12:1-13; 12:23-28. In fact in Exodus 12:43-50 no Gentile was allowed to take the Passover unless he got circumcised.

This is certainly different than the age of Grace that we live in. In Galatians 2:7 Paul preached “the gospel of the uncircumcision” to us Gentiles and therefore speaks against circumcision in Galatians 5:2 and 6:15. He also instructed the Galatians (hence the Body of Christ – the New Creature) not to be observing days and months and times and years – Galatians 4:8-10. Colossians 2:16,17 directly warns against someone spoiling us of the riches of God’s grace and says:

“Let no man therefore judge you in meat, or in drink, or in respect of an holyday,
or of the new moon, or of the sabbath days: Which are a shadow of things to come;
but the body is of Christ.”

Not only does it tell us not to respect holydays, it also tells us why. They belong to Israel and are a shadow of things to come. Not the present day. In the present day God is dealing with the Body of Christ. Hope all that helps.