The Ravens didn't come from Baltimore. They were stolen from Cleveland.
They were never the Browns in Baltimore. They are a whole new organization. At least Art Modell had the class to leave the Browns name, logo and history with the city of Clevelan and also voted favorably and lobbied for the NFL to expand back to Cleveland. Cleveland did not have to wait for 12 years. The Browns have a rich history like the Colts. The Irsay family has no such sensitivity.