As far as I know the only connection between Easter and Passover is the fact that it is the belief held by Christians that Jesus was betrayed at a Passover Seder, i.e., the Last Supper, and that he was crucified shortly thereafter, only to arise and ascend on the day that is now celebrated as Easter.
It goes without saying that the Jewish religion existed long before the year that is widely held to be that of Christ’s birth, since Christ was born a Jew, so the story goes.
Passover is the holiday during which the story of the emancipation of the Jews from slavery in Egypt is told and retold, year after year so as to never forget that the Jews were once enslaved and managed to escape and receive the 10 Commandments from God. Within the story is a theme of renewal and rebirth, of death and of starting over Thus, eggs are featured on the dinner table at the Seder. Easter eggs are something else entirely, and I can’t claim to know why eggs and bunnies are part of the Easter celebration.
I just wanted to clarify this.
I also want to clarify that Jews were not always slaves in Egypt. They were once prosperous and highly regarded members of Egyptian society. Their fortunes turned at some point later due to the hatred of one particular Pharaoh. I think this part of the story is very very important because it is repeated throughout history in different contexts, e.g., Spain, Eastern Europe in the Hitler years. Nothing is certain, one cannot be complacent about hate. My grandfather left medical school in Germany when things started to go downhill for the Jews there. He never became a doctor, but he also managed to avoid the terrible fate of so many Jews in Germany during that time period.
We were once free, but then we were slaves.
We were once slaves, but then we were free.
And so on? Let’s hope not.