It's about control. Republicans in general and Trump in particular have been screeching about the FBI and DOJ being full of "Obama loyalists" which anyone with half a brain knows isn't true. Trump obviously thinks they should be protecting him, but that's not the way these organizations are supposed to work, they should be independent. With the memo squarely targeting Rosenstein it is clear he is the next to be removed.
If we are not careful the DOJ will end up staffed with Trump loyalists doing his bidding instead of enforcing the law. Third world dictatorship anyone?
You conservatives who are always shouting about liberty and freedom need to wake up and look around. It's being taken away and it isn't the liberals who are stealing it from you.