The Bad Plus, who are performing at Indianapolis’ Jazz Kitchen Saturday night, have posted a collective statement in response to some of the reviews they got during their recent swing through the UK. Said reviews often hit upon the Plus’ choice of songbook (Black Sabbath’s “Iron Man,” Blondie’s “Heart of Glass,” Nirvana’s “All Apologies,” etc.) as tired irony, a joke being run into the ground, etc. BP’s sincere and spirited defense is…