There is no doubt that if a person makes a statement of kufr in a form of a joke, he becomes a kafir. But did you know that if a Muslim laughs at a statement of kufr whether made by a Muslim or a Non-Muslim he/she also becomes a kafir? How many times have one heard jokes about Allah (God), or other tenants of Islamic faith on TV shows, movies and youtube videos? How many a times have one considered them funny?
May Allah protect our Iman and the Iman of our progeny. How evil are TV shows and movies!
الفاظ الكفر للعلامة بدر الرشيد الحنفي 23