They ‘care’ because they are part of the same worldwide organization (BLM) with the same ends - the utter destruction of police forces in the US and through their connections in the anarchist community and with Hamas the imposition of Sharia and Islam everywhere.
Remember ISIS said to attack and kill whites as that would not be seen as a jihadi attack, so kill LEOs and destroy locally ruled police while instituting Federal control over local police forces - making them arms of the Federal government. All part of the Marxist plan mixed with Islam.
BINGO! Anyone who believes that BLM is about racial injustice needs to crawl out from under the turnip truck.
BLM is being used to gin up a crisis and globalists/NWO/liberals "never let a crisis go to waste".
Obama tipped his hand yesterday with his proposal of more federal control of local/state law enforcement. But there are many other goals, including but not limited to:
1) Grabbing guns out of the hands of law abiding citizens
2) Limiting free speech
3) Strengthening the executive branch at the expense of the legislative and judicial branches
4) Elimination of the middle class through transfer of wealth
5) Civil war which will justify Executive emergency powers
6) Federalization all law enforcement 7) Repeal of the Tenth Amendment (federalism).
Their goals are clear as day. All you have to do is look at the liberal rhetoric that rears its ugly head after each of these events. They don't even bother to disguise it any more.