I don't quite know, but because easter was (commercialized???) into some type of egg hunt with a bunny that (lays eggs?????) . So, to them an egg hunt with toys and candy and oh look, cute animals! And don't get me wrong, you can be Christian and still celebrate easter like that. You can be an Athiest and not celebrate easter like that. But either way, Easter IS about Jesus's birthday, but again, celebrate it however you'd like. Just remember the original meaning.