So whatever you believe about these things keep between yourself and God. Blessed is the man who does not condemn himself by what he approves (Romans 14:22).
Halloween is not the night of the Walking Dead. People don’t turn into werewolves on a full moon. There’s no such thing as vampires, zombies, or Jeepers Creepers.
God has made the world and everything in it. Evil, as bad as it is, does not run unbridled in this world. No one goes to bed at night afraid that while he sleeps the local cemetery will come alive with the walking dead who leave their graves and invade town to drink blood and eat brains.
That is, no one but the immature and unbalanced.
Some Christians have gone crazy – utterly losing their common sense – over Halloween. They are so fearful of evil – of cooperating with the devil, of being a partaker in evil devices, and so panicky at the thought of goblins, demons, and witches – that they attack other Christians who let their kids dress up like Power Rangers and gather candy from their neighbors. To them, you are participating in the devil’s night while he is at work all over the world.
They are so much more spiritual than you.