It was this sort of justice that gave rise to vigilantism in The American West.
America must regain the nation, though any means necessary.
Until we have equal justice under the law, the law has no meaning.
Not really much you can do about it... ...unless you're Batman.
There is a great deal we can do about it. Vote, civil disobedience, to start with. Refuse to pay taxes until the law is applied to all people. If one person does it, they will be killed, if a thousand do it, they will be oppressed, if 10,000 do it, the rulers will take notice.