This is some radical swag. A Muslim nonprofit that’s raked in over $260,000 in taxpayer dough and has ties to Mayor Zohran Mamdani hosted a pop-up fundraiser featuring a twisted array of trinkets promoting Hamas and other US-designated terror groups. During the Muslim American Society’s Jan. 18 support-Sudan event at its Brooklyn youth center, vendors peddled key chains, stickers, pins and other tchotchkes in support of Hamas, Hezbollah and the Popular Front for the Liberation of Palestine.