20% of the Republican Party identifies as not Christian. That's 36 million people. It's almost like you need to go back and read what I read.
And I'm sure there exists a percentage of democrats who would deny gays the right to marry. Certainly less than republicans, given the increase in average education level.
But that's besides the point. Your argument is that no Democrat could be a true christian, because they must all support the gays and that makes it impossible for them to be christian. And this is stupid because there are countless tenants in the bible that are ignored by both parties. And that's because the document itself was the result of bronze age nonsense. And a good example of that would be our shellfish argument. As not a single republican has come forth with a genuine effort to restrict the sale and consumption of such, while the bible is crystal clear that it's a big no-no.
So how then can republicans claim to be the true christians, when they are just as likely to ignore those provisions in the bible?
The truth is the answer to what makes a true christian is in no way concrete, as you have countless interpretations of what a true christian would be. Republicans just like to wrap themselves in that banner of righteousness, often just to push messages they cannot defend.
The very notion that we are less christian today, as opposed to some other era in America, turns again on a shady definition of true christianity. You saw that pretty starkly during the civil war, as both sides of the political spectrum claimed they were following biblical teachings for their positions on slavery. The left pointed to passages of treating your fellow man with respect as proof that they were more christian. The right pointed to passages in both the old and new testaments that permitted slavery, to declare that they were in fact the more christian party.
So the notion that any democrat or republican can't be a true christian, is a pretty stupid argument to have, given that neither seems to uphold actual biblical theory (thank god).
And given that our founding fathers worked so hard to separate our church and state, I think your notion of throwing out such an insult is, most tellingly, un-american.