some people think that there is nothing bad about it becuase it is just like making a simple art for everybody and it is like pleasing God because you honored him by making some christian iconography...well, in some cases, they are bad too because you are like doing a sinful thing because some think that thery are idolizing people, disciples of God or even Jesus Christ, also, it really depends on what you think of it and what you are feeling.
well, they are very adorable and amazing.. some of the christian symbols that often appear on Christian Iconography are the dove, which figures the Holy Spirit; the fish, symbol of Christ, from the Greek icthus, an anagram for Jesus Christ, Son of God, Savior; the monkey or reptile as symbol of evil; and the bowl or pitcher of water and the vase of lilies that signify the Virgin's purity in the Annunciation scene.
background:
By reason of its long history and the dynamic concepts that controlled it, the growth of Christian iconography is rich and varied. Beginning with the catacomb frescoes in the early centuries of the Christian era, it deals with the perils faced by the human soul on earth in its journey toward eternal salvation. Figures from the Old Testament (e.g., Abraham, Judith and Holofernes), episodes from the life and passion of Jesus (e.g., the Nativity, the Descent from the Cross, the Pietà ), scenes from the life of the Virgin Mary (e.g., the Sacred Conversation, the Visitation), scenes from the lives of the saints (e.g., St. Francis Receiving the Stigmata, St. Jerome in the Wilderness, the Martyrdom of St. Agatha), and symbolic scenes of ultimate beatitude (e.g., the Majesty, the Savior of the World, the Coronation of the Virgin), all reveal the same purpose—to repeat in many forms and inculcate in every mind the moral aims and fundamental dogmas of the Christian religion.
A long series of evolutionary stages unfolds in the representation of a given person or scene from the art of the catacombs to that of the Gothic cathedrals. Thus the art of the Middle Ages is above all a kind of sacred writing whose system of characters, i.e., the iconography, had to be learned by every artist. It was governed also by a kind of sacred mathematics, in which position, grouping, symmetry, and number were of extraordinary importance and were themselves an integral part of the iconography.
From earliest times Christian iconography has likewise been a symbolic code, showing the faithful one thing and inviting them to see in it the figure of another. Some examples are: the dove, which figures the Holy Spirit; the fish, symbol of Christ, from the Greek icthus, an anagram for Jesus Christ, Son of God, Savior; the monkey or reptile as symbol of evil; and the bowl or pitcher of water and the vase of lilies that signify the Virgin's purity in the Annunciation scene. In Christian art, form is thus the vehicle of spiritual meaning; in the expression and reading of this meaning lies the essence of Christian iconography.