Oh I understand what they teach and believe. In most cases better than Catholics themselves. Such as Catholics actually pray TO saints and Mary asking them to specifically perform tasks reserved to Christ or the Holy Spirit. The Catholic Church believes they serve the same god as Muslims. The Catholic Church actually says that it was the confession of Peter rather than the man himself that the church is built on.
You make a rather large boast and sadly, your interpretation is quite off the mark.
Catholics, as all Christians, ask other believers to pray for them. I may ask my neighbor to pray I find a new job. I may ask St. Anthony to pray for me to find my keys. In both cases, we are asking brothers and sisters in Christ to approach the Father on our behalf.
It is not a taught doctrine or otherwise, to belief either Our Lady, or the Saints in Heaven, bear the power of the Divine. To assume so would be a violation of the First Commandment.
Jews believe in the God of Abraham, but don’t recognize Jesus. Jesus, as a perfect Jew, believed His father was the God of Abraham. Catholics, following the example of Jesus, believe in the God of Abraham. Muslims claim to believe in the God of Abraham. Like the Jews, however, they do not believe in the Trinity.
If you've ever read Luke's Gospel, you said the Hail Mary, ha ha on you. The claim that Jesus built His Church on Peter's confession is strictly a protestant position. The muzzie/Catholic God issue is a bit sticky and not wishing to be complicit in more of your uncharitable banter, I shall save it for another time.