While you are correct in your assessment of the book you are mistaken in the view of Baptists historically concerning the teachings of the RC. Baptists have historically been anti-Catholic.
Let us not confuse the derogatory opinions of SOME disgruntled Baptists with the attitude toward the Roman Catholic Church by Baptist Church leaders with more than a minimal education in Christian theology and history, and a love and appreciation for Christians regardless of differences in opinion.
The reasons for this are easily seen in the differences between Baptist doctrine and RC doctrine. The only way to reconcile the two is by complete compromise. A simple study of RC doctrine and practice will bear this out. The RC doctrine of baptismal regeneration, seven sacraments, putting tradition on par with the Scriptures, the poop as the head of the church and many more that I could name make it impossible to fellowship and agree with the RC.
The difference between Calvinism and Arminianism is greater than the difference between Roman Catholic theology (when correctly understood by Protestants) and Baptist theology. May I suggest that you read the commentary on the Greek text of Romans by the Roman Catholic Jesuit scholar Joseph A. Fitzmyer, and that you also read the exegetical commentary on Romans by Baptist scholar Thomas R. Schreiner (
http://www.sbts.edu/academics/faculty/thomas-r-schreiner/ )? One thing that you will immediately notice is that Schreiner cites Fitzmyer’s commentary about 430 times! Fitzmyer is one of the most read and appreciated scholars of Romans today among Baptist scholars. The same, except for the books of the Bible that they wrote on, is true of Roman Catholic scholars Raymond E. Brown (who before his death in 1998 was a guest speaker in Baptist churches), and Luke Timothy Johnson. Brown, it may be noted, had more severe critics among some Roman Catholics than he did among Baptists. Nonetheless, ultra conservative Baptists believe that Brown was too liberal, while liberal Baptists criticize him for being excessively cautious in his redaction criticism of the Gospel According to John, and believe that Roman Catholic scholar Rudolf Schnackenburg was (he died in 2002) very much more realistic in his 1,700+ page commentary on the Gospel According to John. That these men were (before they died) or are Romans Catholics is a minor issue among Baptist scholars—and it should be a minor issue among all Baptists.
Indeed, the strongest anti-Catholic sentiments among Baptists have nearly always been held by those Baptists who were the least knowledgeable about Roman Catholicism and the Bible. Among Baptists who are very knowledgeable about both, a loving and close fellowship with Roman Catholics is a common reality.
About a month after I began my first pastorate in a huge metropolis, the rector of the Roman Catholic Cathedral invited me for a chat. That chat lasted for an hour and a half, and his secretary did not allow our conversation to be interrupted by so much as a single telephone call. Never before or since has any pastor showed to me the respect and love that was shown to me by that priest. Although he was the senior pastor of the largest congregation in the metropolis, he to took 90 minutes out of his busy schedule to get to know me and to learn what I believed regarding the Scriptures as a fellow pastor. Those 90 minutes was the most blessed fellowship that I have ever experienced with another brother in Christ!
My Baptist denomination ordains women and allows them to pastor churches. I believe with all of my being that that is an abomination. Does praying to a brother or sister who has passed on to glory even begin to compare with such an abomination? I do not believe that it does. I have never prayed to the deceased because I do not feel a need to do so, but I have never seen the practice harm anyone, and neither Jesus nor any writer in either the Old or the New Testament wrote against the practice. We have instructions and examples in the Bible regarding how to pray, and although they do no mention praying to saints or to the Virgin Mary, they do not teach against it.