All faiths may have something in common -- in fact, I'm sure they -- but that does not mean they are a common faith.
... the mistake is to collapse the diversity which springs from that desire into one undifferentiated whole. And there's at least two reasons for that. One is that human experiences are inevitably particular. My experiences are conditioned by my context. Yours by yours. The differences should not be minimised – consumed, say, by some high expression of benevolence. Rather, they should be maximised – sorted and sifted. This is because our growth as individuals lies in discerning our experiences, and that means keeping them sharp, not dissolving them in some soggy universal.