I say this with gentleness in sincerity. What do you know about Sola Scriptura or Sola Fide? I do not know the historical research you have done on either, but I imagine it is a misunderstanding of the original teachings, granted many protestants have strayed away from the original teachings due to their own misunderstandings and anti-romanism. It reminds me of the issue of the fillioque. A lot of the controversy is actually just an issue of semantics and linguistic nuance.
Sola Fide speaks out against the RC folk theology that was much more prevalent then than it is today, though it still is prevalent. It shows up in some areas more than others. In any case, the notion that if someone wears a scapular it will save them from the gates of hell just because they die wearing it. Or the idea that if you observe such and such a feast and visit such and such a relic and do such a such an action you will be as “pure as you were on the day of your baptism.” Does this not happen EVERY time after confession? Sola Fide is also not the idea that works are irrelevant to salvation. Jesus said a good tree bears good fruit. The tree is what makes the fruit, the fruit is not what makes the tree. True faith is a work of the Spirit and is followed by true repentance, Christ gives true grace, which then leads to true sanctification. There is a difference in saying that the grace of God produces good works in one’s life and saying my works are what merits the grace of God.
Sola Scriptura is not intended to be Scripture in a vacuum, void of tradition. The Reformers were actually looking to tradition as part of their cause. They especially drew from St. Augustine. Sola Scriptura was to say that Scripture, in light of the traditions of the EARLY church, and proper exegesis should be the final rule of faith, not the magisterium. Remember that in the Luther’s day the magisterium were using tradition as an excuse for all kinds of abuses. No one could say ANYTHING to rebuke or correct the corruption of the magisterium because the magisterium was the true interpreter of Scripture and contender of the faith, and so if they said it that was it.
Now you can say I have a “incorrect” interpretation of history, but you cannot ignore the abuses of Rome in the time of the Reformation. You can read the earlier writings of Luther and see that he struggled with the idea of the pope being corrupt and having to leave the RCC.
My last remark, in regards to the OP, there a large number of Saints and Church Fathers who have made anti-Semitic remarks, and who have misbehaved horribly towards Jews and Pagans. Does this in anyway invalidate the One, Holy, Catholic, and Apostolic Church (in the historical sense of those words, not the Roman sense)? No. If such things invalidated doctrines, structural bodies, or ideological movements, the RC would have be invalidated a long time ago, especially in the Medieval era. I would not invalidate the RC for atrocities for the errors of some men, though I will speak out against its unwillingness to critically self-examine itself. At the end of the day, friend, sin divides and the wickedness of many in the clerical ranks of that day ran rampant. If Protestantism was/is a heresy, the unrighteousness of Rome past birthed the monster.