Jonathan Lipnicki is putting his MMA skills to good use ... trying to prevent more anti-Semitic attacks from happening in the L.A. area by escorting Orthodox Jews to temple.
We got the "Jerry McGuire" star in the Fairfax District near The Grove Friday, where he and fellow actor/martial artist Remi Franklin were on the ready to help worshipers safely enter and leave temple.
Jonathan and Remi organized after an attack last May ... where a group of pro-Palestinian men attacked Jewish diners outside Sushi Fumi.
Remi says there have been a slew incidents, where people have tried running over kids and shooting them with paintballs.