Response from recent visitor:
If you want this site to take off, I think you need to attract the attention of people like my Hebrew teacher, who is a PhD candidate in one of the relevant fields. He's a committed Christian, and yet teaches Hebrew Bible at my synagogue, where he and his students get along like a house on fire. That doesn't mean that his or our doctrinal views never come up, just that they are side-comments on the main project at hand.
The main project at hand is 'how can we best use linguistic evidence to make sense of this text?,' not 'doctrinally, how has religion R interpreted this text?'
Now, the purely linguistic approach to understanding text is, of course, just one way that people engage with it. But I think, based on the other answers here, that it is the distinctive intended feature of this site as compared to the religion sites.
In the short time I've been visiting, I've seen a few Hebrew Bible questions that are posed from a distinctively Christian viewpoint, and a few answers as well. I didn't stomp off in a huff, but I also knew better than to pick an argument. If people want to ask and answer this way, that's fine ... but I think that it does not help you to attract the genuine experts on the texts whom you will need to make this a long-term success.
I'd point to Is there a link between the Jewish expectation of a literal Messianic kingdom and the command to witness to the ends of the earth in Acts 1? in particular; I'm not quite sure how to classify this, but it seems, superficially, to be predominantly doctrinal.