The King James Bible says,
Exodus 20:3-6 KJV
3 Thou shalt have no other gods before me.
4 Thou shalt not make unto thee 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.
5 Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;
6 And shewing mercy unto thousands of them that love me, and keep my commandments.
However, Catholics have lots of different saints and idols. I understand that they are Christians, but they bow down and serve their saints and images. I feel that they worship them. One example is the Black Nazarene which has Papal Approval by Pope Innocent X and Pope Pius VII. From my understanding, many people die because of this idol every year. They claim that this idol can heal people by just touching it. The Catholic church doesn't do anything to stop (what I consider) worshiping the Black Nazareth.
Is Catholicism a true denomination of Christianity, even if they have these practices which I believe are heretical?