The Protestant Creeds on Roman Catholicism

I recently submitted a comment on Dr. Francis Beckwith's blog in response to other comments made there. Dr. Beckwith recently converted to Roman Catholicism, and apparently, some Protestants are giving much approval and condemning all who would do otherwise. This is what I posted along with the quote from one of those "Protestants":

the cachinnator said, "I'm a Baptist seminarian here in Waco with you who finds himself more and more in sympathy with Catholicism. I am horrified by the condemnations and judgments pronounced by those who would call me brother. Shame on all who did so. What a blight on the name of Christ."

Me:
Then you stand against all historical Protestant traditions which denounce Rome as a false church and anathematize their teaching on justification on the basis of Galatians 1:6-9.

I quote the following, not to make people mad or to offend anyone, but the gravity of Dr. Beckwith's decision cannot be overemphasized!

"And, therefore, such as profess the true reformed religion should not marry with infidels, Papists, or other idolaters: neither should such as are godly be unequally yoked, by marrying with such as are notoriously wicked in their life, or maintain damnable heresies."
-The Westminster Confession of Faith of 1647, ch.25 sec.5

"The Lord Jesus Christ is the head of the Church, in whom, by the appointment of the Father, all power for the calling, institution, order, or government of the Church is invested in a supreme and sovereign manner; neither can the Pope of Rome, in any sense, be head thereof, but is no other than Antichrist, that man of sin and son of perdition, that exalteth himself in the Church against Christ, and all that is called God: whom the Lord shall destroy with the brightness of his coming."
-The London Baptist Confession of Faith 1689, ch.26, sec.4