Curious political phenomenon: when Obama was elected, many who objected to criticizing his policies blamed everything on Bush, saying it would take time to clean up what Obama had inherited from Bush. That went on for quite a while like fingernails on a chalkboard.
Now there’s a current which denounces Obama & liberals every time there’s a criticism of Trump. It’s the same current that supports Assad & Putin. It’s not unlikely that if you could look back at who objected to criticism of Obama they would be many of the same people objecting to criticism of Trump.