Ahimsaman, what you have said is that a Southern Baptist who follows his church’s teachings does believe that Catholics are not Christian. Baptist heretics, who pick and choose from among their denomination’s teachings, don’t believe it. So it really depends upon whether one is a “true Baptist” or not.
As you know, I was raised in a Southern Baptist church and my Sunday School class, Bible study, and Sunday sermons were all about how the Pope was the antichrist and the Catholic Church was the Whore of Babylon, week after week, month upon month, year following year. As you also know, I went to a Southern Baptist funeral recently where I heard more of the same. They can’t even bury the dead without slamming Catholics. Consequently, I do not have a benign view of the Baptists.
Southern Baptists are not the only ones who hold anti-Catholic views. My experience with the GARBC, various Independent
Baptists, Landmark Baptists, and others have all proven to be more of the same.
I’m glad you, your church, and those you know are not like this – but you surely recognize that you are the exceptions, since you wrote that it’s not official denominational doctrine. When the SB denomination writes in its charter that others who follow Christ according to the dictates of their conscience are their separated brethren and deserve to be called Christian, I’ll believe it. That’s about the same time h-e-double toothpicks will freeze over.

Jay Damien
Ex-Southern Baptist, ex-agnostic, ex-atheist, ecstatic to be Catholic!
Blessed Father Damien, pray for us!