Since the standards for acceptable behavior have clearly changed, why are we not fighting BRANDON like this?
Because the Republicans don't realize it is a war.
POTUS, like Congress, is elected ceremonial (puppet actor) position. As long as the puppet actor stays within the script boundaries, the opposition and undermining is low-key. In Brandon's case, the power structure has complete discretion and freedom. There is no opposition, he says what they ask him to say. His "experts" are in control.
The government is in a condition of revolution against the people - or something that passes for government. Who really controls is complicated, but NGOs, government agencies, lobbyists, and at the top, global money interests (including organized crime and kickbacks to the so-called "law enforcers") are where the power really lies.
Because conservatives are without political backbone and they cannot seem to bind together over a common cause.