Stephen Baldwin Photog Incident NOT Alec's Fault


Stephen Baldwin had big bro Alec Baldwin's back last night ... telling TMZ that his brother is not to blame for laying that alleged smackdown on a photographer earlier this week.

The Baldwin brother (Stephen, that is) was outside Katsuya restaurant in L.A. Friday night ... where he gave us some insights into Alec's confrontation with a NY Daily News photog ... and he's adamant Alec has changed his ways.

Stephen says his brother wouldn't get violent without good reason. He adds ... if a pap instigated a "situation" ... any reaction is pure human nature.