Time and time and time again, we have seen that American police officers shoot first and ask questions later if they see a black man with a gun and they lie and lie and lie about what happened and try to pass all blame on the black man they have just shot. This is even more the case when they shoot an innocent black man, as has happened at least twice recently.
Do you want to know how to get restrictions on the 2nd Amendment? Encourage every African-American in the country to legally buy firearms and you would have 2nd Amendment restrictions before the ink was dry on their bills of sale. White Americans are terrified by the thought of legally armed black men, which is why they refuse to acknowledge their 2nd Amendment rights.