“I’m not fond of adult’s dressing up in costumes. I think it’s silly. Just my opinion.”
I suppose there are many things in society which are silly to some degree. Oversized guys chasing inflated pigskin around a field might be considered silly. The list is large to be sure. But I don’t think God would have us eliminate all of that type of “silly” out of our lives.
Pagan holidays, like Christmas, Easter, Halloween, etc. are a different matter. False worship is in the heart. Yet actions can have impact on others, no matter where your heart is. If you believe having your children “trick-or treat” is a stumbling block to other believers, then by all means, don’t do it.
I’m all for kid treat or treating. I don’t believe any of the holidays you listed are pagan - no matter their origin. I can’t live in a cultural vacuum. I need to know that the great western traditions reach back into an ancient past and will (I hope) continue into the distant future.