Neither of those assertions is entirely clear to me. But perhaps you're right; I don't know. Among the many things I know very little about is how people who observe Easter experience the story of Jesus' death and resurrection.

Of course, mourning isn't necessarily the only strong emotion that's relevant. I don't know that I'm mourning anything with respect to my stroke, but I'd probably nevertheless be hurt if I perceived some group as mocking it.

But perhaps Easter is not associated with any other strong emotions about the Slain and Risen Savior that believers would prefer not to have made light of, either. Again, I don't really know, and I don't claim to be definitive.