Hi glenn wallace!
It would appear that this move was a bone the Romney campaign felt they had to throw out to the hard Right. I suppose the potential endorsement of a group like the Log Cabin Republicans wasn't considered to be enough of a compensation. The Log Cabin Republicans are an Republican advocacy group whose members are gay -- they are therefore what we would call 'progressive' on LGBT issues.
Now, I may be being cynical but here's something I wouldn't put past the Romney campaign, given the general deviousness of politicians: Maybe the Romney campaign DELIBERATELY hired Grenell, knowing that he is gay PRECISELY so that they could fire him at an opportune moment, you know, to show, or to try to sell the idea that Romney 'didn't know' about Grenell's sexual orientation, and that he, Mitt Romney, is 'strong on family values,' blah, blah, blah.....
As you know, Mitt Romney has struggled with a credibility problem with Republicans. In the opinion of most pundits I've heard, it is because of this that he had such hard time 'closing the deal,' as it were, during the primaries. The Republican establishment just weren't sure about him, his ideology. Just how committed is he to this conservative thing?