July is 100% correct here, the whole kneeling thing isn't working for what Kapernick and others are opposing. In general I've never felt that protesting accomplishes much of anything other than making oneself a target for government or political enemies. If Kapernick and other players really want to make an actual difference when it comes to government goon squad abuse here's what they should do.
1. Support Gun Rights and Self Defense
Athletes should know that they're a much higher target for crimes (both government and private) given their high public profiles and wealth. So arming themselves should really be a no-brainer. However it shouldn't be enough to be armed themselves they should go into neighborhoods and teach about gun rights and usage. There is a great guy named Maj Toure who runs the organization Black Guns Matter . Toure's organization is decided to introducing if not reintroducing gun rights to black neighborhoods. Athletes should absolutely be backing Toure's project and if not they should be doing something on their own.
2. Support Self and Community/Neighborhood Defense
Anarcho-Captialists know government security is a joke and harms people more than it helps. Not to mention that it has been ruled that government security has no obligation to protect you. So this is an area that should be promoted.
The Black Panthers while an awful left-socialist and racist group did three things right; they exercised their right to carry firearms, patrolled their neighborhoods and filmed cops. The result of this was that cops were significantly more "civil" when Black Panther patrols were around.
Also reaching out to organizations like CopBlock and Photography is Not A Crime is a must. Given that the media, no matter if it's the local or the national they are stenographers for the police. These two organizations are one of the best when it comes to documenting government security abuse.
3. Stop caring on what the opposition thinks
Like communists, cop supporters cannot be reasoned with. There is no reason to attempt to win these people over they will always hate you even if you choose to lick the boots. Their criticisms only exist to distract you from the real problem, they have no interest in changing their line of thinking.
There is no guarantee that any of this will work or change anything but it's more productive than taking a knee.