question #2 Sahih al-Bukhari 6492, Book 81, Hadith 81 : What might cause people to underestimate the severity of certain sins?

Anas said “You people do (bad) deeds (commit sins) which seem in your eyes as tiny (minute) than
hair while we used to consider those (very deeds) during the life-time of the Prophet (ﷺ) as destructive
sins.”