Classic Hypocritical Liberal Reaction to Defeat

Just heard the City of San Francisco plans to file suit in federal court challenging the constitutionality of Proposition 8, the ballot intiative to ban same sex marriage, which just lost in California. Here's my take on this. If Prop 8 had passed, the same crowd would be hailing it's passage as the progressive voice of the people. How brutality hypocritical. If they really had a problem with it, why did they wait to challenge it until it lost? Because voters only count with liberals when they agree with them.