The yelling and cheering could be heard more than a block away from the Brooklyn Academy of Music on Saturday evening. For an hour and a half before Batsheva Dance Company performed at BAM’s Howard Gilman Opera House, protesters gathered in support of a cultural boycott of Israel, part of the larger Boycott, Divestment, Sanctions (BDS) movement against the country. The protesters’ signs, held high around a Palestinian flag waving in the frigid wind, featured slogans like “Don’t dance around apartheid” and “Batsheva proud ambassador of racism.”