A federal judge Wednesday blasted lawyers from Shefsky & Froelich Ltd. for displaying a “disrespectful, unprofessional and petulant attitude” while representing Chicago Public Schools in a class-action lawsuit over the education provided to disabled students. In a written opinion, U.S. District Judge Robert W. Gettleman said attorneys who litigated the long-running case on behalf of CPS — before Shefsky & Froelich got involved — asserted the district's positions “forcefully …