Indifferentism

Part of speech: noun (n.)

1. State of indifference; want of interest or earnestness; especially, a systematic apathy regarding what is true or false in religion or philosophy; agnosticism. The indifferentism which equalizes all religions and gives equal rights to truth and error. Cardinal Manning.

2. Same as Identism.

3. A heresy consisting in an unconcern for any particular creed, provided the morals be right and good. Gregory XVI.