It is easy enough to be friendly to one's friends. But to befriend the one who regards himself as your enemy is the quintessence of true religion. The other is mere business.
Religion was nearly dead because there was no longer real belief in future life; but something was struggling to take its place - service - social service - the ants creed, the bees creed.
Culture's essential service to a religion is to destroy intellectual idolatry, the recurrent tendency in religion to replace the object of its worship with its present understanding and forms of approach to that object.
By religion, then, I understand a propitiation or conciliation of powers superior to man which are believed to direct and control the course of nature and of human life.
I hope we will not so characterize religious people as being so narrow and so biased towards people not of their own religion that they cannot even work with them in this common cause to which you say they are committed.