Saying "You" when not addressing anyone in particular is a classic dog whistle technique. Everyone in the audience knows exactly who you're talking about, and plausible deniability is preserved for future accusations of racism/bigotry.
Of course, silverstorm did not actually explain anything at all. All he did was repeat a few standard dog whistle arguments used by racists with a couple of geek culture references thrown in to pander to the audience.
Let's take a look.
1. Appeal to imaginary "social contract" -- an attempt to establish a criteria for who should be accepted into society based on some vague, unspecific standard. Used in various forms by dominant demographic to argue against immigration.
2. "Learn to speak English" -- Good to see this is still being used. Incredibly high reliability as an indicator of racism, almost to the point where I expect it to soon fall out of favor among racists. [0]
3. Warnings of radical change to society ("attempt to create Little Elbonia", "completely reshape government") -- A common, highly effective technique based on natural human fear of the unknown and preference to status quo.
And of course, silverstorm's response to being challenged was equally standard -- repeated reference to "phenomenon" to avoid potential challenges to assertions, it's only a few bad apples ("a phenomenon which sometimes happens", "many immigrants are well-educated"), preemptive dismissal of direct accusation as self-evidently absurd ("I'm a jingoistic, nationalistic, racist dirtbag?").
[0] See, e.g., Lee Atwater 1981 interview for more on evolution of racist rhetoric and its adaption in response to public awareness of true meanings. http://www.thenation.com/article/170841/exclusive-lee-atwate...