Here is a statement made in 2003 by a very wise man of blessed memory, an iconographer and hieromonk, who gave this advice regarding the recent phenomenon of the appearance of "icons" of various well-known people, many of whom were not Orthodox. While he is referring to iconography, there is plenty here which is relevant to the subject of this thread:
It seems to be a new fad to paint "icons" of secular, non-Orthodox, or even non-Christian persons. While in the worldly sense, they might have lived good and decent lives, it simply is not possible to portray them in an iconographical manner from the Orthodox point of view. Since all icons are a reflection of Christ, and since the saints, as St Ignatius of Stavropol says, "express in themselves daily, the Holy Trinity", and since the Holy Spirit can only reside where there is Truth, then non-Orthodox people cannot achieve that sanctity which would put them in the same spiritual realm as St Nicholas the Wonderworker, the Great-martyr Catherine, or St John of Shanghai and San Francisco.
One can hardly think of Harvey Milk, a slain homosexual city councilman, as either a saint or a martyr. It is for God alone to judge his soul, but how could one list him as among the saints? Each generation of mankind has produced its heroes, great generals, great rulers, and so on, but it is the province of Christ's Church, the Holy Orthodox Church alone, to set aside those who are to be venerated as saints. The memories and lives of great men and women most certainly can be respected and held up as a good example, but the appellation saint, is in another realm completely. It is a rather curious phenomenon that people have such high opinions of themselves; "I am a very spiritual person" is often heard, and people write books and go on television to discuss their "Angels" who are some sort of demigods, but usually these people never mention God, or Christ!
Food for thought, folks.