If that was completely true, why hasn't immigration been voted on? Boehner seems fine with breaking it to avoid deadlines and cliffs, but that's largely it. There is no cliff for immigration, and therefore it'll die a slow death.
Things will get better as republicans slowly lose the House between now and 2020, largely because the economy should continue to improve. I don't think right wing extremism will simply disappear when Obama leaves office, in fact it might get worse if Hillary wins. Not simply because they hate Hillary Clinton, but because this entire freakout is mainly about the decrease of white influence/power and the rise multiculturalism.
Have you guys read any of the "focus on the white vote" stuff coming from the right?
http://www.redstate.com/2013/07/17/fear-of-the-missing-white-voters/
Dax posted a Nate Cohen takedown on this general idea, and Cohen has continued to discuss it
http://www.newrepublic.com/article/113940/missing-white-voters-they-exist-not-enough-gop
This is truly a hail mary attempt. And when it doesn't work in 2016, it's game over for them. That will only increase their irrationality, fear, and anger. When you listen to Fox's portrayal of Obama's race comments you get the impression Obama is about to call for the execution of white people any minute now; black people are just waiting for his marching orders. That fear is real.