Bottom line, Alex, regardless of one’s religious affiliation, when you sit out the vote, you suffer the consequences and they cannot complain. Voting is a cherished privilege. I have not missed one election since I could legally vote at age 21. Take away that privilege and all of those who did not vote, will march on Washington.
Do we know that it was evangelicals who "sat out the vote"? Did evangelicalism hold the line, or lose membership from 2008 to 2012? Do we know that all 300,000 "missing voters" would have selected Romney, had they voted?
Here's a novel thought - how about we blame the people who actually voted for Obama, for re-electing Obama? Do you think we can do that?