Is Christ dangerous? Was Paul or Peter dangerous people as possesers of faith?
I think so, definitely. Perhaps less as possessors of "faith" than as persons claiming (or represented as claiming) truth.
But remember my "remedy/poison" suggestion: their "truth" was potentially harmful inasmuch as it was potentially helpful.
The core of Christianity as represented by the Gospels' Jesus or by Paul has power for both. Don't you think the calls to "die to yourself," to "forsake everything and everyone for the good news," are potentially destructive, for anyone who takes them seriously (which is admittedly rare)? In the exact measure they are potentially dangerous they are, also, potentially liberating.
Kierkegaard once remarked (from his own experience) that when you take Christianity seriously at too young an age it can break you down beyond repair. This should be pondered more by Christian pastors and teachers imo.
and a dreadful inquisitor with correct beliefs.
A question for Narkisos , name one that was both dreadful and was correct in what they were doing?
As Peter said of Paul's teachings, anyone can twist things to their own destruction.
Notice how you shifted from my expression, "correct beliefs," to "correct in what they were doing". I am not going there.
There are not too many beliefs universally recognised as correct. If mathematics count, I'm sure there are a number of dreadful math profs around. Those are the nightmare of their students even though (and at least partly because) they are continually, systematically, desperately right.
Now if we lower the standard to what is recognised as truth in a specific place and time, examples multiply. As you are a Christian, think of any historical creed you consider correct and ask yourself how many people have been persecuted, tortured and killed for believing otherwise. Secularists can ask the same question about the persecution of believers as it occurred during or after the French or Russian revolutions for instance.
Inquisitors are dreadful not because their beliefs may be wrong, but because they are certain to be right. Truth, whether absolute or perceived, is essentially totalitarian.