Using Old Testament Priesthood to Defend Roman Catholic Priesthood?

While I was having some occasional updates on some Roman Catholic faith defender blogs (who call themselves as Catholic Faith Defenders), they say that their garments are pretty much in harmony with the Bible and so are their extrabiblical traditions.

The Biblical mitre was administered to Aaron the first high priest from the tribe of Levi the priestly clan. In the first time the word "mitre" appears in the Bible, it's in Exodus 28:4 which also describes the attire of the Levites- a breastplate, an ephod, a robe, a broidered coat, a mitre and a girdle. First notice the shape of Judaism vs. to that of the Roman Catholic mitre.

Also one thing must be noted about Aaron's succession was not celibate but rather it's from Aaron down to his DESCENDANTS. Here's one verse to consider concerning succession:

Deuteronomy 10:6- "And the children of Israel took their journey from Beeroth of the childrne of Jaakan to Moses: there Aaron died and there he was buried and Eleazar his son ministered in the priest's office in his stead." 

The Good News Translation reads, "The Israelites set out from the wells that belonged to the people of Jaakan, and went to Moserah. There Aaron died and was buried and his son Eleazar SUCCEEDED HIM AS PRIEST."

Also, the Old Testament priests were required to MARRY:

Leviticus 21:13-14 says, "And he shall take a wife in her virginity. A widow, or a divorced woman or profane, or a harlot these shall he not take but he shall take a virgin in his own people to wife."

The Good News Translation reads, "He shall MARRY a virgin, not a widow or divorced woman or a woman who has been a prostitute. He shall marry only a virgin from his own clan."

Also in Leviticus 14, please notice this- the priests are the SONS of Aaron, meaning Aaron's descendants. The tradition of the Old Testament priesthood demanded the priests to be from the tribe of Levi, the LINEAGE of Aaron and for them to be married to virgins. If they didn't comply with that, God didn't recognize that earthly priesthood! In the New Testament, the Levite priesthood is gone YET God demanded still marriage for the pastors:

1 Timothy 3:1-2- "This is a true saying, If any man desire the office of a BISHOP, he desireth a good work. A bishop must be blameless, THE HUSBAND OF ONE WIFE, vigilant, sober, of good behavior, given to hospitality, apt to teach;" 

The Good News Translation says, "This is a true saying: if a man is eager to be a church leader, he desires an excellent work. A church leader must be without fault; he must have only ONE WIFE, be sober, self-controlled, and orderly; he must welcome strangers in his home; he must be able to teach;".

Then the Catholic Faith Defenders can argue that priests and church leaders are different people. Looking at it, doesn't the Roman Catholic priest LEAD the people?! Isn't anybody who leads the leader? Again their logic is so confused, it's very eisegesis or out of context.