That's another thing that i don't understand about the GOP, why is the party radicalizing with Trump and Cruz?
Well, the conservatives might disagree with me, but I tend to believe that the GOP courted radical elements over the last 8 years to counter Obama. There's been a lot of tapping into anger, and stoking fires, and ridiculous claims coming from GOP politicians like "Obama is the most divisive president ever" or "Obama is the worst president ever". The nonsense over Obamacare was very similar - and even if you dislike the program, it is obvious that it was misrepresented by the GOP. The most egregious and horrible lie, of course, was Sarah Palin's "death panels" nonsense, but there's lots more like it.
Once this anger was accessed, it seems to be unable to be stopped. We called it the Tea Party, because they misunderstood US history and what the Boston Tea Party actually was. It's a smallish bloc, but it shows up reliably for things like primaries, which means it controls the nominees. Small blocs that vote reliably in low-turnout elections have a disproportionate amount of power.
The Tea Party started tossing out GOP moderates, replacing them with Tea Party extremists. Sometimes, in places like Texas and Utah, this didn't make a difference. In Senate races in Nevada, Delaware, Missouri, and Indiana, it was a huge loss of moderates, where Democrats won with their own moderates. There are very few GOP moderates left in the US Congress. This slow shift in power has led to the ouster of John Boehner as the Speaker of the House, because he wasn't pure enough, and he was moved against by more radical members of his party.
This slow shift in power is matched by the degradation of the rhetoric, and the belief that Obama/the Democrats are the worst by those people. Doesn't hurt that a huge segment of these people are ensconced in the right-wing echo chamber of Fox News + Breitbart + talk radio. I still remember people in 2012 talking about "unskewed polls" that showed that Mitt Romney was going to win the election, and the huge amount of people who believed it, because it was
what they wanted to believe. Of course, Romney lost, and while it wasn't a runaway by Obama, it wasn't close, either.
Now, that anger has hit the presidential scene. These people are afraid, they are angry, and they are not smart. They seek simple, furious solutions to complex, logical problems. And that is why you have Trump and Cruz. The GOP courted anger and fury, and now it controls them, as the mob controls a man who once sought a favour. Simply put: they are reaping what they have sowed. Reasonable conservative voices, like Mitt Romney and George HW Bush and Gerald Ford and Dwight Eisenhower are either long gone or they are ignored, drowned out by the screams of
build a wall! Ban the Muslims! Fire the IRS! and those people who scream don't want to consider what is reasonable, what will be helpful - and what can actually be done.