Are Any Roman Catholics Christian?

Here are some thoughts that I gave in response to this question in an email conversation earlier this week:

I'm sure that many Roman Catholics are Christian in the same way that many Evangelicals are not- in that many people do not follow the teachings of their churches. In that a condition of the heart is what God requires, rather than a formal adherence to a creed, I'm sure that there are many Evangelicals who would give assent to proper gospel teachings, and who yet do not have true faith; likewise, there are probably many Roman Catholics who would say that they believe the grace of justification is administered through the sacrament of baptism, and yet some of these-in their heart- may be trusting simply in Christ for their salvation. Roman Catholic teaching is certainly anti-gospel, and anyone within the Roman Catholic communion is certainly in a dangerous position as the gospel- that "message of Christ" through which faith comes- is being systematically obscured through their doctrine.