Reflection 1-58
There are myriad reasons why people leave the Deen in this day and age – the slow rust of sin, scourge of skepticism and doubt, preconceived notions of the Truth, negative interactions with Muslims, hubris of intellect, the apparent rational appeal of alternative ideologies or personalities, the desire to fit in, growing weary of restrictions, anger at life, over-entitlement, the quiet escape from guilt, despair over hell, blurring between religion and culture, lack of any perceived benefit, attention, financial benefit, societal acceptance, depression and boredom, and the list goes on.
What they share in common is a defect in the defector not the Deen.