It's not a well thought out protest. Do the Ford employees expect the cops to jog to their house when someone has broken in?
Individually we all can't solve it all, but if they're able to take this stand and make it uncomfortable enough for management, they've done something that may contribute to the changes they're looking for.
Like, say, Amazon de-listing Washington Redskins merch. I personally love that move. Maybe, collectively, these things lead to the changes.
If police departments feel pressure in many different ways, they may start allowing for leadership and changes that have a material impact in the way they operate.
If that's your concern, consider it allayed.
It's a giant cash cow for Ford. This will only hurt Ford.
Police already have vehicles... and they can source new vehicles from any other willing company... even if it was a foreign company like Toyota.