Tainted genius:
Russian noble/Upper Class.
Idle and Turbulent Disposition.
Being at Hopeless Outs with society.
Plunged into the stream of revolution.
I see the point, Bakunin was a rebel through and through and he cast out his nobility for the company of the low brow crowd. Even so, that doesn't qualify as tainted genius, it says nothing of a man intelligence, his knowledge and intuition and vision. All those points, him being a bum, his disposition don't speak about his philosophy.
To be fair, anything that didn't meet with Lothrop's worldview was going to be seen as tainted.
He is a victim of the box his education put him into, as well.
It is just one more purview to be purveyed.
Perhaps somebody may learn something from it having been resurrected from the memory hole.