Unfortunately, extremists, by their very nature, have more energy. This translates to their disproportionate turnout in primaries, and so the more oily candidates feel they have to appease the rabid psychos with anti-gay, anti-Mexican, anti-black, and anti-Muslim rhetoric as soon as they leave the gate.
For a number of years now, Republicans have had two shitty choices to select from within the party. On one side, you have your big spending, big borrowing, big government old Establishment types. On the other side, you have your maniacal, bigoted, retarded, nuke-em-all-and-let-God-sort-em-out, borrowed-bible thumpers.
Which is why I stopped voting.