Idolatry is rampant throughout Roman Catholicism. Statues, relics, saints, Mary, even the eucharist are all exalted while the gospel of Jesus Christ has long been crowded out. Interestingly enough, in Rome's interpretation of the Ten Commandments, idolatry is not seen as an individual commandment and instead coveting is seen as two.

Rome states that "Veneration of sacred images is based on the mystery of the Incarnation of the Word of God. It is not contrary to the first commandment" (CCC 2141). 

Idolatry is a very serious offense against God. In Romans 1:21-25 we see that God gave over idolators to their impure lusts because their love for Him had been corrupted by idolatry. Furthermore, in 1 Cor 6:9-10 we see that idolaters are excluded from the kingdom of Heaven. Make no mistake, idolatry can happen inside a church and even practiced by those who unknowingly have been deceived.

Verse Jewish Catholic Christian
Ex 20:1 "And God spoke all these words, saying," 1 1 1
Ex 20:2 "I am the Lord your God, who brought you out of the land of Egypt, out of the house of slavery."
Ex 20:3 "You shall have no other gods before me."
Ex 20:4 "You shall not make for yourself a carved image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth." 2 2
Ex 20:5 "You shall not bow down to them or serve them, for I the Lord your God am a jealous God, visiting the iniquity of the fathers on the children to the third and the fourth generation of those who hate me,"
Ex 20:6 "but showing steadfast love to thousands of those who love me and keep my commandments."
Ex 20:7 "You shall not take the name of the Lord your God in vain, for the Lord will not hold him guiltless who takes his name in vain." 3 2 3
Ex 20:8 "Remember the Sabbath day, to keep it holy." 4 3 4
Ex 20:9 "Six days you shall labor, and do all your work,"
Ex 20:10 "but the seventh day is a Sabbath to the Lord your God. On it you shall not do any work, you, or your son, or your daughter, your male servant, or your female servant, or your livestock, or the sojourner who is within your gates."
Ex 20:11 "For in six days the Lord made heaven and earth, the sea, and all that is in them, and rested on the seventh day. Therefore the Lord blessed the Sabbath day and made it holy."
Ex 20:12 "Honor your father and your mother, that your days may be long in the land that the Lord your God is giving you." 5 4 5
Ex 20:13 "You shall not murder" 6 5 6
Ex 20:14 "You shall not commit adultery." 7 6 7
Ex 20:15 "You shall not steal." 8 7 8
Ex 20:16 "You shall not bear false witness against your neighbor." 9 8 9
Ex 20:17 "You shall not covet your neighbor’s house; you shall not covet your neighbor’s wife, or his male servant, or his female servant, or his ox, or his donkey, or anything that is your neighbor’s." 10 9 10

We must lovingly show Catholics that salvation is not found in a relic, statue, saint, Mary, or wafer but that it is found in Jesus Christ as revealed in the living Word of God to be received through repentance and faith (Mk 1:15).