Roger L. Simon describes how and why he "switched sides." For me - this is the money line.
One of the most interesting aspects of political change is that most of us who have experienced it don’t feel as if we have changed. We still see ourselves as the same person, live in the same skin. To us, it is the world that has changed — at least for the most part.
As an illustration, a significant number of people changed their views of global affairs immediately after September 11, 2001. Our country was attacked by an ideology that was misogynistic, homophobic, anti-democratic, racist, xenophobic, and religiously intolerant and that sought world domination — in short was the enemy of all classically liberal society since the Enlightenment.
The majority of our people recognized this and sought to push back, asserting the values of our culture — for a year or two. Then — as that most hypocritical of ideologies “political correctness” reasserted itself — the majority of that majority reverted to type and we had the election of Barack Obama… twice.