A letter signed by dozens of Muslim and Arab groups in the US has been shared publicly with the aim of pressuring US President Joe Biden to call for a ceasefire in Israel’s war in Gaza. Theletter, sent by the American Muslim Task Force on Palestine, and signed by 80 Muslim-American, Arab-American and Palestinian-American groups, including the Council on American-Islamic Relations, says that Biden’s policy on Israel has “severely damaged” his ties with their communities. “In advance of this weekend’s March on Washington for Gaza, we – the undersigned Muslim American, Arab American and Palestini…