Your memory isn't any bettter than mine then Out!  LOL      There is a difference in the tone of criticism.   While Obama did indeed get call racial slurs on a daily basis, his own composure never led him to the childish insults of Trump.  If the dialog of dissent has gotten worse, it starts with the man in office and Trump has degraded our public dialog to levels that I never thought I'd see in this country.

I don't blame conservatives for this by the way.  The say and do anything anarchist and the say and do anything Trumpites aren't much different.  They use 'free speech' to legitimize gutter talk and outright contemptuous lies.     The 'reject our parents values' of the 60's unleashed a torrent of unhealthy and uncivilized behaviors in the name of egocentric self expression.   Right or left, it's self centered egotism, winning over facts and wise deliberation.   

 Tolerance taken to the extreme leaves us with very little common ground on which to build our communities.