It does, because if immigration was the cause of Argentina's downfall, then it'd be the fault of a few dozen thousand people...
Common identity is the most important part of a collective. You might as well say that egoist anarchists aren't a collective because they don't have structure or organization.
"gave the poor a voice"
More like, sent to the guilliotine everyone who complained about bread prices. Did you read about the French Revolution at fucking all?