I Have a Question

Totally honest because I do wonder. So I always wondered why christians celebrate easter with bunnies and eggs or christmas with trees and Santa when all that stuff has pagan origins. I can understand why back in the day before information was pretty much instant I can understand. But these days it doesn't make sense. Especially when most christians will call everything satanic because it's pre-Christian but they'll do valentine's day and be all low key saturnallia.