George Walker Bush was a center right candidate pushing an ideology called "compassionate conservatism."
After his election Bush began moving left toward the center. GW Bush moved so far left that he past the center.
The result of Bush's leftward swing was that American ended up with a Republican administration that dramatically expanded the Federal role in health care and education. Bush engaged in unprecedented deficit spending and got America mired in two foreign wars.
During the Bush Administration, the Democratic Party turned radically left. Bush's left of center administration opened up an opportunity for the radical left to take over.
The Tea Party of 2009 wasn't just unhappy with Obama. It was unhappy with GW Bush who's left of center administration turned our country into a mess.
Donald Trump is a center-right populist who is moving left to maintain his popularity.
The left wing reaction to Trump is even more shrill than the reaction to Bush. What we are likely to see happen is that Trump will continue to move left to maintain his popularity. His center-right candidacy will become a center-left administration.
The really bad news is that Trump will, most likely, be replaced by another far left administration.
This stupidity that we see is due largely to a partisan ideology called "conservatism." Unless the GOP address the inherent flaws of conservatism, our nation is doomed forever to follow the letward progression seen in the Bush/Obama years. We can't handle much more of it.