When will the world learn that intolerance solves no problems? This is not a lesson which the Fundamentalists alone need to learn; the liberals also need to learn it.
From a 1922 sermon. So the answer would seem to be, "We're mighty slow learners."
Another beautiful bit:
“Cantankerousness is worse than heterodoxy.” There are many opinions in the field of modern controversy concerning which I am not sure whether they are right or wrong, but there is one thing I am sure of: courtesy and kindliness and tolerance and humility and fairness are right. Opinions may be mistaken; love never is.
This whole sermon is worth a read.