In the following 5 minute video, a Masters Seminary professor provides a thoughtful response to the question of how a Christian ought to celebrate halloween.
If you have young children, or if your church celebrates this holiday, then your concerns are likely covered in the course of this brief video:
Should you be concerned about the pagan nature of the halloween celebration, or other pagan elements in our culture? Should you be knowledgeable about how paganism presents in 2019 so that you might limit its impact upon your family?
See, categories, Paganism / Neopaganism, for my series on paganism. That series provides basic information about paganism as it is currently appearing in our culture.