Steph Curry -- NBA Security 'Profiled' My Father-In-Law ... 'Threatened to Arrest Him'

Steph Curry and his wife, Ayesha, claim her father was "profiled" and "almost arrested" by NBA security at Game 6 in Cleveland Thursday night ... in a case of mistaken identity.

Ayesha first went public about the situation after the game -- tweeting, "Police racial profiled my father and told him to remove credentials and tried to arrest him."

Steph echoed her comments to ESPN on his way out of the stadium -- after the Warriors lost to the Cavs.

But NBA security says it can explain ... telling ESPN Ayesha's father bared a resemblance to a con artist named David Aminzadeh who had been using fake credentials to sneak into major sporting events.

Security spoke with Ayesha's dad -- and eventually determined he was NOT Aminzadeh.