Assalamualaikum! Is it kufr akbar to watch movies where they celebrate haram (like homosexuality) for entertainment knowing it is haram. Is that endorsing kufr as the movie is making haram into halal, and must a person retake shahada after?

Ustadh AbdulAziz al-Haqqan

No, but this person should seek a psychiatrist because he suffers from OCD, Waswas.