In essence, Art is entirely a human endeavour unnecessary for the practicalities of life, but done solely for personal ‘aesthetic’ reasons perceived as pleasant to the human eye and for human consumption alone. It has no place in the worship of God, indeed it is an offence to Him, for whatever reason humans do art, it is an imitation of things He has created, and a bad one at that which pretends to equals (or even surpass) His creation, thus offending Him. It can be said that when man tries to emulate, supplement, alter, or counteract the work of nature (God’s creation) it is like him defecating in a pot, lifting it up and saying to God: "look at what I have done for you". The second commandment clearly forbids the making, the displaying and the worshipping of any product of art: "You shall not make to you any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth." (Exo 20:4).
This is because art takes away the glory which is due ONLY to God to give it to the man made Statue/Image itself of the person represented other than God. For example take the many images of "Christ". Imagine, if when someone wanted to talk to you, they made themselves a hollow, lifeless plaster doll, that they said represented you, brought it into your presence and instead of talking to you directly, they talked to the lifeless plaster doll, as if it were you, all the while ignoring the real you who was right there with them. Would you think someone who did that was very foolish? Would you be offended by someone who "sees you" as a plaster dummy or a bit of paint on a canvas? And if, after your telling them that you don't like them doing that, and emphatically telling them not to do it, they kept doing it anyway, would you become angry with them? By His own words, it makes God very angry too. You aren't a dummy and God isn't a dummy either. The same holds true for using statues or images to worship or pray (or even to hang around) to Jesus or the dead saints of the past (just as it's wrong to worship or pray to the living saints of the present).