https://www.vox.com/2016/3/22/112787...s-racism-nixon
The historic record shows that the desired policy outcome of the initiation of the "War on Drugs" was the oppression of black people. Given that fact, it's unsurprising that a black athlete has been ensnared in it.
Just because something is legal doesn't mean it's ethical. Slavery was legal. Jim Crow was legal. The "War on Drugs" is the latest, legal implementation of this nation's effort to oppress black people.
It's unfortunate that people feel greater loyalty to a racist, unethical law than they do to another human being with whom they have a connection, even it is as just a sports fan.