Sean Strickland Wishes Natan Levy Had Beaten Troll More, 'Carve A 'J' In His Forehead'

Sean Strickland is upset Natan Levy didn't really kick the crap out of his troll last month ... telling TMZ Sports if he had been in the same situation, he would've straight-up carved a "J" on the guy's forehead with his elbow. Levy, who's Jewish,…