In the same way that the 13th amendment does the exact opposite of abolishing slavery, I suppose.
There is no contradiction here for people who believe themselves entitled to protection from the law as opposed to being repressed by it... it is the unspoken contract that white supremacism implies.
I really can’t tell where you fall in any of this, but the 13th amendment is the stated legal justification for the slavery in the United States, right now.
Masquenox definitely agrees with you about that. I think what they're saying is that the kind of people with both of these stickers on the back of their trucks do have an internally consistent ideology that amounts to 'rules for thee, but not for me' where the 'thee' is most often minorities.