Yes you are growing new angry straight white guys (and their wives who usually come along with). I've seen it happen to my friends and people I went to HS with (based on FB) - usually guys who didn't really start caring about politics until their 40s and were never and still aren't very politically informed at all. Bonus points if they're mildy racist to begin with.
The question is will it be enough angry straight white guys to keep the party viable - especially as you gain smaller and smaller percentages of every other minority group - as your angry white guy rhetoric alienates them even further*.
*see Arizona, Republican primary debates, CPAC topics, immigration reform, Ted Nugent, Todd Akin and his rape theorist buddies, "states rights", forced trans-vaginal ultrasounds, etc.