Vinikias, apparently, you have met only obnoxious, vehemently anti-Catholic Protestants, or you, yourself, have approached them in a similar manner, forcing them to fight back. Do ALL non-Catholics act similarly, in your experience? If so, the problem is your lack of charity. If not, may I suggest you steer clear of Protestants because it sounds as if your attitude drives them further into heresy and hatred of the True Faith. Your words are not becoming a Catholic.
Yes, I have a few Protestant relatives, who are better described as functional agnostics. I work with Protestants, and was one myself, so I do believe I'm qualified to correct you. At present, three of my work colleagues are seriously investigating several truths of Catholicism that are generally rejected by Protestants. (Devotion to BVM, the Saints, the Catholic Church as source of the Bible) It IS ignorance, not so much invincible, as never considered because no Catholic cared enough to say anything. Please check out Fr. Joseph Pfeiffer's sermon given on August 25 in Danbury, Connecticut. It is still on YouTube or available on CathInfo as mp3.