NEW YORK — Two days after a Bronx man got into an altercation with the Guardian Angels in Times Square, the group’s leader, Curtis Sliwa, took his lumps Thursday from a broad swath of elected officials and everyday New Yorkers. Sliwa, who erroneously identified the Bronxite as a Venezuelan migrant during a live interview Tuesday night on national TV, gave a defiant mea culpa Thursday afternoon to the Daily News, saying he could have been “milder and calmer.” But that didn’t stop the political class from reining down rhetorical blows on the conservative radio personality. “Washed-up comic book …