People believe in the Divine according to the stage of their inner progress and maturity. Some worship Rama and Krishna in Ayodhya or Mathura as the poornam (absolute manifestation of Divinity). It is not at all wrong to do so; only, one should not proclaim that their belief alone is the truth, that the forms which they have ascribed are the 'only' names and forms of the Divine and all the others are unsuitable and inferior. Poornam implies the Lord is Universal. One must always be conscious of this and acquire the vision that all forms of God are equally valid and true.

-Divine Discourse, Prema Vahini.

See Good, Be Good and Do Good.  This is the way to God. - Baba