I don’t have a Domincan background. I didn’t write that piece. It was written by a former Domincan priest who came to know Christ and now ministers to Catholics and others about the history and theology of Rome.
I’m a Baptist with lots of very lost Catholic relatives. Telling Catholics the biblical truth about Christ is the precise opposite of anti-Catholicism. If I didn’t care I wouldn’t bother. I know you may not grasp that, but it’s true.
I think I understand -- and appreciate --- the caring you are talking about.
I live here in Upper East Tennessee where Catholics are about 2% of the population, and there's a vast wealth of Baptists and non-denoms. Through homeschooling and pro-life I've come in contact with a number of mission-minded Evangelicals who (a little short on knowledge but by no means lacking in goodwill) wished to earnestly share the Gospel and possibly lead me away from the errors and oddities of Rome.
We get door-to-door Adventists and Mormons, too, all sincerely solicitous for my soul.
I like and enjoy them all, actually. I respect, precisely, their concern, which indicates an impulse of generosity on their part.
We really ought to compete in courtesy and honor, in kindness and prayer. That won't hurt any of us, and will please our Master for sure.
As a Catholic who shares your love for Christ and His Word, recall Paul's letter to the Romans 15:20-21
Thus I aspire to proclaim the gospel not where Christ has already been named, so that I do not build on another's foundation, but as it is written: "Those who have never been told of him shall see, and those who have never heard of him shall understand."
Your Catholic relatives are saved through the Sacrament of Baptism. If you desire to win souls for Christ, you should consider evangelizing secularists, atheists, agnostics and muslims. There are plenty of fish in the sea in need of your zealous preaching.