If all lives matters then shouldn't  White lives pay attention to the the subjugation of Black lives?

No.                 

Where have you been????     Many have been saying for years about Democrats keeping blacks under their thumb to be guaranteed their vote.  Look at all the people supposedly “representing” blacks. They are now millionaires with mansions and $5000 suits.  Even the BLM organizer is buying up expensive properties.  Blacks are even subjugating blacks along with the Democrat party.    There is big money in “representing” blacks. Where would these people be IF they didn’t have an “oppressed” group to “represent”???  If blacks weren’t “oppressed”?    That is subjugation.