“Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons” (1 Timothy 4:1).
People who have their hearts set on cruelty cannot know God and they will only mock the spirit and those who embody it. If they interpret 1 Timothy as saying anyone who restricts food has a demon, then do they believe God had a demon when he restricted the food of Adam and Eve? Clearly they either don’t know the scripture, cannot reason, or only want to mock true believers. Remember the words Jesus told us in John 15, that if they mock you, they first mocked him. They are of the world and you are of God.