No matter how someone attempts to justify the tradition of Halloween, the bottom line is, ADONAI considers even the appearance of evil to be an abomination! Halloween glorifies the idea of death, decay, monsters, devils, ax murderers, etc. YHWH commands His people to stay away from those things! That didn't change just because "Jesus died!"
Here are just a couple of the hundreds of reminders in Scripture that YHWH's people are to abstain from evil of every kind (1 Thessalonians 5:22).
Deuteronomy 18:10 There must not be found among you anyone who makes his son or daughter pass through fire, a diviner, a soothsayer, an enchanter, a sorcerer, 11 a spell-caster, a consulter of ghosts or spirits, or a necromancer. 12 For whoever does these things is detestable to ADONAI, and because of these abominations ADONAI your God is driving them out ahead of you. 13 You must be wholehearted with ADONAI your God. (CJB)
Isaiah 47: 10 You were at ease in your wickedness, you thought, "No one sees me." Your "wisdom" and "knowledge" perverted you, as you thought to yourself, "I am important, and no one else." 11 Yet disaster will befall you, and you won't know how to charm it away; calamity will come upon you, and you won't be able to turn it aside; ruin will overcome you, suddenly, before you know it.
12 So for now, keep on with your powerful spells and your many occult practices; from childhood you have been working at them; maybe they will do you some good, maybe you will inspire terror! 13 You are worn out with all your consultations - so let the astrologers and stargazers, the monthly horoscope-makers, come forward now and save you from the things that will come upon you!
14 Look, they will be like straw! The fire will consume them. They will not save even themselves from the power of the flame. It will not be coals for warming oneself, not a fire to sit beside! (CJB)
Deuteronomy 18:10 "There must not be found among you anyone who is doing detestable things." (CJB)
Ephesians 5:11 Take no part in the unfruitful works of darkness, but instead expose them. (CJB)
I challenge you to Google the many scriptures wherein YHWH commands His people to "be holy for I am holy!" Leviticus 20:7 is just ONE example: 7 Consecrate yourselves and be holy, for I am Yahweh your God.
If you go after the UNHOLY - no matter how "innocent" your intent might be, or how much "fun" it might be for the kids - you're NOT honoring our Creator! The BIBLE says so!