A teacher at a Brooklyn school serving students from a large Palestinian community is under fire for posting social media comments such as “Let Gaza Burn’’ and “There are no innocents.’’ Pro-Palestinian activists are demanding the city Department of Education investigate The Fort Hamilton School instructor Robert Rossicone over his comments. The PS 104 elementary-middle school serves students from the largest Palestinian-American and Arabic communities in the state. “Look at these ANIMALS. And the people who support this, or call for a ceasefire, are dogs as well,” Rossicone said in one exchange in response to a Hamas video that the...