Seems like a sweeping generalization to me. Do you have any evidence of your statement? You may be right. I would assume judges have opinions, but would attempt to make their rulings without letting their prejudices effect them. It becomes harder all the time to believe that more and more judges are not swayed by politics.Especially when those nominating them are more and more political.
I have known and know some judges well, and quite a few more by reliable anecdote and reputation.