1. Many of them are not Christians at all, being either heretics or eventual de-converts.
2. Genuine Christian women are often afflicted with silly notions about dating. It flows downstream from a distorted view of Providence I can best describe as a mystical fatalism. They rout if they get the slightest feeling of discomfort about things. It often has nothing to do with Providence and everything to do with their own fears, insecurities, and so forth. To mask it in religious language is tiresome and, to a degree insulting.
3. Oh then there are the old women who reckon themselves as seers of some kind. This class of controlling hag gives advice without knowing the man or the situation, because they are over-protective of their charge. I have seen this copy-pasted since I started dating in 2009. With Christian girls, it was never the father who got in the way and always some tertiary witch who had the wrong eggs for breakfast before they consulted the oracle.
I want to stress again that it isn't any one person. The same cursed formula has played out more than once. Yet I have charged forth because it seems one cannot have a Christian wife without fighting these things off on some level, or at least that is my experience. I don't blame women either as a sex. I'm sure there are male equivalents. The cultural rot afflicts us all. That and I'd never claim to be the perfect catch- there are definitely valid reasons to send me packing. I just wish those reasons were stated honestly so I knew what to do with them.
Which brings me to non-Christian girls.
I had a good decade of hurt behind me before I gave them a try out of frustration. Again, I don't recommend it in the final analysis, but I have been temporarily happier dating non-Christians because our disagreements are straight-forward and communication is clearer. You begin addressing the 800 pound gorilla in the room, so the smaller animals are easier to address and have a good laugh over.
So from a standpoint of worldly wisdom and throw-away culture, I understand where the OP is coming from. But long-range Biblical wisdom tells me otherwise. If you want to build a family, your house has to recognize the same God.
I notice you've posted more than once about 'understanding' why peeps might want to not date christians. So, Desdichado, why do you say that (or however you want to say it)? You know, what's disappointing about today's christians, etc?