From Obsolete Film
Questions always arise as to whether using Catholic Symbols is really a type of idolatry. Usually for the reason that the questioner isn't altogether acquainted with what these symbols actually are. We don't worship the crucifix. We use it remember of Jesus suffering and death for the sins. We don't worship the fish. We display it as a proud emblem in our Christianity. We don't worship the statues from the saints. We use them to point out their wonderful lives so that they may be role-models for us to emulate.
As far back as when the Ten Commandments received to Moses, idolatry in the Old Testament was defined as the worship of idols or images. It is the worship of anything but God that's wrong and sinful. The mere images, symbols or icons aren't the issue.
An excellent illustration of this within the duration of Moses may be the Brass Serpent. God commanded Moses to create this Brass Serpent and lift it high for stopping any Israelite who checked out it of snakebites. I repeat it had been God who commanded Moses to make this image. Later in history, King Hezekiah destroyed the Serpent since the Hebrew people have been burning incense to it in worship. The symbol had eventually become an item of idolatry. See the difference?
When God gave commandments regarding idolatry he meant so that it is understood in the most literal form. According to the Bible, most idolaters really thought that their idols were gods. That is not so today with Catholic Symbols.