Catholics have some strange non-biblical beliefs but they don't believe Mary is a deity or that priests are Christs or that all paths lead to God. Purgatory is worrisome, as is the belief that Mary was sinless, but Catholics don't even believe everything else you've mentioned. Please get your facts straight.
"The priest is, indeed, another Christ, or in some way, he is himself a continuation of Christ." (Pope Pius XI, Encylical on the Priesthood)
Catholics began using the title 'Mary, Mother of God' at the Council of Ephesus in 431 AD. They also capitalize any reference to Mary, just like the Bible does for Jesus and Yahweh. Additionally, in the Catholic Bible, they add all kinds of extra titles to Mary that are not in earlier translations.
"Since Christ died for all, and since all men are in fact called to one and the same destiny, which is divine, we must hold that the Holy Spirit offers to all the possibility of being made partakers, in a way known to God, of the Paschal mystery." Every man who is ignorant of the Gospel of Christ and of his Church, but seeks the truth and does the will of God in accordance with his understanding of it, can be saved. It may be supposed that such persons would have desired Baptism explicitly if they had known its necessity. (This came from the OFFICIAL Catholic Catechism)
Please check YOUR facts. I do thorough research, and have done so for the last 2-3 years, and have come to the conclusion that the Catholic Church has false doctrines littering its' beliefs. Having said that, there are surely a load of Catholics that do not believe everything lain down by the pope and believe whole-heartedly in Christ's sacrifice and salvation.