I assures you that if only 20% of Catholics voted for Obama and were blamed for Romney’s loss when twice as many evangelicals voted for Obama, then we would never hear the end of it, and playing the numbers game would not be tolerated.
Looking at the numbers of the 20% who voted liberal has warrant some place, but the issue was that evangelicals were being blamed for Romney’s loss, and when it was pointed out that they were the most conservative block, and stats showed Catholics as voting twice as much for Obama, then you saw attempts to focus on the numbers of evangelicals (and give some excuse to Catholics because of “historical baggage”), which which is irrelevant as to which block is more liberal.
At least no one has called Pew research biased, which is one of the more usual responses to such stats.
Well, the statistics show that the majority of evangelicals voted for Romney, so hopefully you won’t continue to see articles here claiming otherwise.