Wow, so you're using Reddit as a credible source for an entire movement? Nice. Why don't we just use Wikipedia in future discussions? I am not identifying with the alt-right mind you, but to blanket the entire movement on what is said on a site that anyone can comment on in anonymity is weak. I am arguing for the sake of accuracy. The internets are ablaze with trolls that love to stir shit up, especially on Reddit.
There is a stark difference between nationalism and white nationalism.
Nationalism is where someone is loyal to and proud of their country often with the belief that it is better and more important than other countries. Whereas White Nationalism is another way of saying supremacist. It is a common tactic of the media to mislabel a group or individual with a race tag to elicit fear and loathing in a target. Such as Trump's chief strategist. I am not denying that WNs exsist, or have considerable numbers for a small group. However, to apply that term to anyone that wants to put their country first is disingenuous at best.
As for the definition of cuck, it has always been a term to describe a man who likes to watch his wife have sex with other men, irrespective of race. Moreover, if a couple decides that is what brings them pleasure, then who are we to criticize or demean a couple that chooses their form of intimacy? Like many internet memes and slang, it has been co-opted for another (usually inaccurate) use.
Milo never originally identified as an Alt-Right member. It was bestowed on him by several liberal media outlets, and he chose to ignore them and eventually go with it in order to troll those outlets. In any event, in a country with over 300 million inhabitants, 100k is a drop in the bucket. This constant reversion to race is doing nothing but furthering the divide in this country. Myself, and many others, don't judge someone by their race. We don't care. We see fellow humans that are judged by their character and actions. I refuse to pay the price for the sins of previous generations and further the divide. It isn't that we don't acknowledge that racism exists, it is that we choose a better path of equality by treating everyone the same. Frankly, I am sick of race being used in virtually every argument. We as a nation have more pressing threats to contend with than fighting over the pigmentation in our skin.
ETA: sorry if it sounds a little preachy at the end. It is a contentious topic I have had to discuss frequently over the past few months and it gets tiring listening to an otherwise logical discussion devolve into a racial issue.