Is it possible to be Christian but not interpret the religion as fact? There are cultural Jews.  Are there cultural Christians who do not interpret the religion as factual?  Is this possible?

Apparently it's also called a "Nominal Christian" - http://en.wikipedia.org/wiki/Cultural_Christian

From the comments:

To my understanding there are people who call themselves Jewish but don't take the religion as factual. They just abide by the culture that coincides. I'm wondering if the same exists for Christians. 

I am asking if someone can call themselves Christian and not believe the claims are factual but they abide by the messages as metaphors instead
Yes, it's called "cultural Christianity." It merely means that you live in a culture that has Christian habits, such as celebrating Easter and Christmas.

If you moved to India, you might - without converting to Hinduism - get into the habit of celebrating Holi or Onam or Diwali with your friends and neighbors.

If you do not believe in the tenants of the religion, however, you're not "a Christian" in the sense you mean.