Perhaps in the mind of a reasonable person, but the general defaming of police has been going on far longer than before George Floyd showed up. Between the liberal media and liberal politicians, I feel confident in stating that many in the police forces around the country would disagree with you.
In my own state, they initially vilified an officer who was called to the scene at a park after people called in, reporting someone flashing a gun wildly around and waving it at people. When the police arrived, this is exactly what was going on. They had no real choice but to shoot, but after the smoke cleared, it turned out to be a 12 year old with a toy gun. National Media did not share your opinion, and they never recanted their reporting.