You are entitled to your opinion, but the veneration of Mary has everything to go with God’s most gracious gift, which is Jesus the son of God, born of a Virgin. She was the means by which God entered history.
Okay, that is one of the most stunted views of God's activity that I have come across. If this is the party line, no wonder the Roman cult is disheveled. "God entered history" through Mary? You are not serious.
God created the heavens and earth by the word of His power, from an act of His will. There was no universe before He acted and He is acting at all moments to sustain the universe. Should He take His mind off this whole enterprise, it would not grind to a halt...it would not exist. To say He entered history through Mary makes Him a bit player in a cheap school play...and this is precisely the way the RCC treats Him. The Roman organization is pre-eminent; God enters through a woman? Please.
Mary is just a human pawn in His hands the way Isaiah, or Moses was. She was given a role and nothing more. She was favored to be the bearer of Jesus entering physically when it came time to provide the Lamb of God, but He had "entered" a billion times before in other forms. He was likely the angel who wrestled with Jacob. He was likely the form which Moses saw walk in front of him. He was likely the One speaking with Adam (Let US make man in our image). After all, no man has seen the Father and lived, right?
The idolatry of the RCC is destructive and wrongheaded, but it is just another expression of the errors of Rome. This thread originally began with the problem of Semi-Pelagianism, a clear error widely held by the RCC today, irrespective of what they claim is official doctrine. Much of so-called Protestantism suffers from it, also. Read Iscool's & HarleyD's posts. They nail it.