Maybe a lot of what I've said is considered more to the right politically than other Obama supporters, but on this issue, my Christianity pushes me to the left. The idea of insurance comes from different historical sources, but one of them is the Church.
In Acts 4, it says " And the multitude of them that believed were of one heart and of one soul: neither said any [of them] that ought of the things which he possessed was his own; but they had all things common."
And when Paul first met with James, Peter, and John, after his conversion, he reports that "... they would that we should remember the poor; the same which I also was forward to do." (Gal 2:10)
From the earliest history of the church, they were coming together, sharing with each other and the poor people of their communities. So I think it's fair to say that the idea of a community coming together to try to help out those in need, which became insurance, is a Christian one, if not exclusively so.
So here's the problem: profit. Just as the Corporation has perverted the profit motive of entrepreneurial capitalism (see my post on debt), so Insurance For Profit has perverted the charitable nature of its roots.