A man is in custody after several Jefferson Park stores were defaced with swastikas, authorities said. Swastikas were painted on the Supreme Smoke Shop’s back door, boarded-up front door and street sign on Tuesday night. The white supremacist graffiti also was found at another nearby shop owned by people of color, Supreme Smoke Shop owner Arcan Abu-hashish said. Charges against the man are pending, said Officer Michelle Tannehill, a spokesperson for Chicago police. Abu-hashish said Thursday that he has a suspicion about who could have left the racist graffiti: a problematic former customer he …