Neckbeard expert here. Been studying the Beardusnecktimite (Commonly known as he who is bearded of neck, or even more commonly known, 'neckbeard') for many years. And while I as an expert will agree that Beardusnecktimite are a very diverse subspecies, your reasoning is false. What you see as a "White Knight" is actually just the common "misogynist neckbeard" (Scientifically known as Niceitomeousguyis) camouflaging himself. Think of how many predators will disguise themselves to get closer to their prey. This is exactly that. You might see a neckbeard saying things typical of a white knight, but don't be fooled. This is merely a technique employed to try to win favor with women, or in the common tongue "m'ladies".

For example, you'll see a neckbeard "white knighting" a m'lady, and it looks genuine. But if his techniques are ineffective (And 99% of the time they are) then the camouflage is quickly dropped and his true colors are shown. The Beardusnecktimite's common attacks include verbal abuse such as "bitch", "slut", or "whore". But they also often employ a tactic of pseudopsychological analyzation of their prey. "This whore has daddy issues" is a decent example. Implying that she woman (whore) has daddy issues and thus does not like 'nice guys' like him, and as such will only date assholes.

I hope I've helped to educate you a bit on your misconception of the two major types of Beardusnecktimite.