LOS ANGELES, Nov 6 (Reuters) - American rapper Macklemore, an outspoken critic of Israel's war in Gaza, said on Friday that major US concert venues including New York's Madison Square Garden. Macklemore is being blocked from performing his Free Palestine Tour in U.S arenas, he said in a lengthy new statement. Singer and songwriter Ed Sheeran has finally broken his silence after Macklemore was removed from his tour.