catholic Chuirch can say all day long they "merely" venerate mary, but actual practice and doctrines are that the RCC worship her, as give to her similar attributes as Christ Himself!
I could not figure out why it was that it seemed to me that Catholics worshiped Mary, even though I had found documentation that the Church clearly condemned worshiping her. As a Baptist I defined worship as songs, prayers and a sermon. If a Catholic sang a song about Mary, petitioned Mary in prayer and preached about her, my Baptist brain told me they were worshiping her. But Catholics define worship differently. They see it as the sacrifice of the Body and Blood of our Lord and Savior, Jesus Christ. Catholics would NEVER offer a sacrifice of Mary nor to Mary on the altar.
I had a wall of emotional block when it came to the 'thing' about Mary. A Catholic asked me, 'why don't you think of Mary as another Christian that you can ask for help?' Hebrews 11 is that great 'faith' chapter and we find a listing of wonderful saints who risked a lot (including their lives) for our Lord. Take a look at the start of chapter 12. It says, 'Therefore, since we are surrounded by so great a cloud of witnesses, let us lay aside every sin and weight that so easily besets us and let us run with perseverence the race set before us, keeping our eyes fixed on Jesus, the pioneer and perfector of our faith.'
Now, I was taught as a Baptist that the contact between heaven and earth is only between each one of us and the Lord, right? As DHK clearly pointed out, contacting the dead is condemned in the OT, right? But Hebrews 12 says that we are 'surrounded (that is present tense) in our race here by all the 'witnesses' (brothers and sister who have gone before us) and it is like we are in a stadium and the people in the stands are cheering us toward our completion of our race.
Are not the prayers of a righteous man very powerful? Don't you ask spiritually mature people to pray for you when you want people to intercede for you? If I can ask my Christian mother here on earth to pray for me and know that God hears her prayers, why then can't I ask the mother of our Lord to pray for me? This is NOT the same as necromancy. Is God the God of the living or the God of the dead? I am not approaching them instead of Jesus but rather going with them to Jesus, the same as I do with brothers and sisters here on earth.
This prayer for intercession is not worship of saints. It does not detract from the glory of God, in fact, it demonstrates His glory.
I also had difficulty with using a rosary. I thought that this was an example of the vain repetition of prayers that was clearly condemned by Jesus. But here is a thought. When you say to your spouse, 'I love you, sweetheart' throughout the day, do they turn to you and say 'c'mon, that is just vain repetition!' Repitition becomes 'vain' when it is said without meaning. Believe me, before I started to use a rosary I prayed, 'Lord, I really hope what I'm about to do does not offend You, if it does, I ask that the Holy Spirit convict me and show me that it is wrong.' Instead of being convicted, I've experienced great peace and joy.
Unfortunately, as seen over and over on this board, many non-Catholics and former Catholics, have been so schooled in hostility toward the Church that they appear unable or unwilling to recognize the distinction between honoring saints and worshiping the Lord. They confidently (often arrogantly) assert that Catholics "worship" Mary and the saints, and, in so doing, commit idolatry. This is patently false, of course, but the education in anti-Catholic prejudice is so strong that one must patiently explain that Catholics do not worship anyone but God—at least given the contemporary use of the term. The Church is very strict about the fact that latria, adoration—what contemporary English speakers call "worship"—is to be given only to God.
Look at the pictures on this thread of people kneeling before a statue. Because a person is praying, it does not mean that he is praying to the statue, just as the fact that someone kneels with a Bible in his hands to pray does not mean that he is worshiping the Bible. Statues or paintings or other artistic devices are used to recall to the mind the person or thing depicted. Just as it is easier to remember one’s mother by looking at her photograph, so it is easier to recall the lives of the saints by looking at representations of them.