A maniac threw a stranger onto a Bronx subway platform and kicked him as he tried to hoist himself to safety in the latest terrifying incident in a string of attacks on the same subway line. An unidentified man approached a 39-year-old straphanger on the northbound 6 train platform at the East 149 Street subway station just after 8:30 p.m. on Tuesday and threw him onto the train’s roadbed, according to the NYPD. He proceeded to viciously kick the male victim back down to the roadbed as he attempted to lift himself to the platform, cops added. Police are searching for a man who allegedly threw a 39-year-old man onto the northbound 6 train tracks on Tuesday. NYPD The victim sustained minor injuries and was brought to a local hospital in stable condition, authorities said. Photos released by the department captured the unhinged shover near a subway turnstile in a black sweatshirt, black sweats, and black sneakers.…