But you can’t just reject it all out of hand on the grounds of ‘paganism’. That leads to the cultish rejection of much that is good.
All the “good” things about Halloween are what...costumes and candy???
Contemplation of mortality, the tying in of the death and rebirth of Nature with the death and rebirth of Man in the person of Christ, honoring those who have died, confronting fears of death . . . . there's lots of worthwhile food for thought under the costumes and candy.
Our parish does a Hallowe'en party where the kids come as their favorite saint. It makes the underlying issues more obvious, but they are there, regardless.