"Calling them Easter worshippers means they were worshipping ON Easter."
I respectfully disagree. "Easter worshippers" means people who worship Easter/Ishtar.
Why didn't they use correct grammar and say "Christians attending Easter service"? Better yet, why didn't they use the preferred term "Resurrection Sunday" instead of Easter? Some Christians object to using the term "Easter" because that was a pagan holiday named after Ishtar.
If we are expected to respect ALL religions, why no respect for Christians?