dating & marrying a "true" Christian

Should a "true" Christian date a non-believer? Should a "true" Christian date another "true" Christian -- especially from the same church? These are two topics that I found in Your Tango -- a website dedicated to love and sex from the point of view of the female species (private joke). I can't believe this site covered such a taboo topic -- religion.

Can A Non-Believer Date A Practicing Christian?
http://www.yourtango.com/201078975/non-believer-date-practicing-christian

11 Reasons To Date A Church-Going Guy
http://www.yourtango.com/200943779/reasons-date-church-going-guy

On the topic of a "true" (practicing, as the website mentions) Christian dating and/or marrying a non-believer, this sounds like a formula for disaster and divorce. A person should date and/or marry a fellow church-goer. This means that they both for the most part share a common faith, religious ideology, social behavior and so on. It's important to have core values like religion that can and hopefully should strengthen a relationship.