It's possible Mr. Costas doesn't know ( or more likely doesn't care ) that the 2nd Amendment reflects the entire reason for the existence of the Constitution: to prevent government from expanding it's power to the point of becoming a tyranny by the use of checks and balances.
In the case of the 2nd Amendment, an armed citizenry represents a physical check on would-be
authoritarian statists. In the 20th Century alone, over 170 million innocent citizens were 'legally' murdered by authoritarian statists. The assumption of moral authority by statists who routinely violate the Constitution and bankrupt the country while forging our chains via 'fairness' legislation is the hypocrisy of a criminal elite. Costas is merely one of their tools.