Insofar as it matters, Google did have an Easter doodle back in 2000: http://www.google.com/doodles/happy-easter-2000
So you can't even say they've ignored the holiday, just that they prefer to highlight different ones from year to year (with exceptions presumably due to internal popularity or artists' personal predilections).
(Sorry for wasting thread space on this old, off-topic, manufactured controversy.)