Halloween tends to demonize Witches, portraying them as evil & perhaps devil worshipers.
Many of them were wise women who represented the feminine spirit. They were often into natural healing & respect for nature.
They often had non christian & non traditional beliefs. Many appear to have agnostics, atheists, humanists, freethinkers, & skeptics, much akin to the people on this site.
Some were martyred for their beliefs by being burned at the stake.
Should we celebrate a holiday that presents people like us as evil???
Like there are people who celebrate Christmas because it's a fun time of year and giving presents et cetera, Halloween, since I didn't believe in any of that shit was about getting candy and wearing costumes. Non-religious.
P. S. Your argument suggests that The wizard of Oz would somehow also be or should be banned for saying that there could be a bad witch
Sure there can be bad witches. Some used their knowledge of herbalism to poison the village well to retaliate against their oppression. Some used their knowledge of psychomatic medicine to kill people by throwing hexes, but the great majority of witches didn't do things like that