Why don't Christians observe/Celebrate Easter, or Ressurectuon Sunday, after or during Jewish Passover?

I really don’t want to get into the “debating” issues about the Pagan origin of “Easter”— I do LIKE the Easter Eggs and Hare just fine. What I am curious about is, why do Christians not celebrate the Day of the Resurrection with Passover?

By the way, some have said that the Eastern churches (Orthodox, Byzantine, Oriental) DO celebrate with Hebrew Passover but this isn’t true, either. Many years, we have three days to contend with—Eastern Orthodox Paschal (or Easter), Catholic/Protestant Easter (or Resurrection Sunday), both of which are estranged from Jewish Passover.

To me (not that my opinion matters or anything), Christians should celebrate Easter/Paschal/Resurrection Sunday during or directly after Passover week.