An attorney facing a six-month suspension argued Friday that a state panel’s recommended punishment singled him out among a whole group of hostile attorneys in a case. In June, a hearing board of the Attorney Registration & Disciplinary Commission urged that David A. Novoselsky — a partner at Novoselsky Law Offices — lose his law license for six months and complete the ARDC’s professionalism seminar. The recommendation was the first time Novoselsky, a lawyer since 1973, faced disciplinary …