I kind of focused on the “not wanting Easter on a Jewish religious holiday” The whole idea of the thing is a permanent Passover. It is our Passover just as much as it was the Jews Passover.
I don’t care about the calendar, but I definitely want the Blood on my lintel.
That restriction is ignored in the West, so the Catholic/Protestant Easter sometimes coincides with Passover and sometimes doesn't (but is always close). The whole confusing topic is addressed here.