Mike Skiff, who is based in Los Angeles, claims the actor and the film's production company deliberately antagonised a demonstration against gay marriage to liven up their footage.
In court documents the cameraman accuses the defendants of discriminating against the gay community and says the angry protest left him with injuries.
The legal papers, filed in LA on Tuesday, claim the Bruno team's conduct was an 'egregious affront to the homosexual community and a despicable example of discrimination, manifested by violence, intimidation and threats'.
Skiff claims Cohen and the Bruno producers arrived in downtown LA on November 2 after learning that a peaceful protest against gay marriage was taking place.
He alleges the team 'descended on the scene without authority or permission' and even carried 'Yes on Proposition 8' signs to incite the debate.
'In order to create dramatic content for its production, Bruno Productions' intent was to promote violent discord between the assembled 'yes' and 'no' factions.'
Skiff is suing Cohen and Cold Stream Productions for assault and battery, violation of civil right and inciting riot.
The cameraman, who claims he received 'serious physical injury' which required medical treatment, is requesting damages of $25,000.