Your soundly reasoned, objective rationale for this is....?
He's got a history of questionable scholarly work on guns and gun control, such as claiming to have done "surveys" that there are no record of actually being performed, and even going as far as creating a fictitious alter ego online to support his own work.
He's also got somewhat shady connections to the NRA and gun manufacturers.
My point is, a shady source relaying here say from a private conversation 20 years ago isn't exactly "proof" of Obama's attitudes on guns.