ANSWER:

Assisting on kufr is to drive someone to a temple to worship their false gods or to buy them their haram scriptures to read from

QUESTION: What is assisting in Kufr that takes one out the fold of Islam, for example if one hands a tea pot to someone and they know that the person they handed the teapot would drink it and share it in a gathering where Islam MAY be mocked? Please answer the specific question and in general