Amen Caleb.
Also, in addition to your rhetorical questions, the scripture posted is also Paul asking a series of rhetorical questions. What Paul is saying is that they don't have fellowship, it's impossible.
The fellowship we share as believers is fellowship together with Jesus. It's impossible to find fellowship with an unbeliever, because our fellowship is with God. We don't find find "fellowship with one another" in the sense most people seem to think (our fellowship is not potlucks and church services, or time in the "fellowship hall"), we are together in fellowship with God, and we gather together to share that.
With that in mind, I could walk into a satanic gathering and kneel in prayer, and even discuss things with them after I finish, and never once come into fellowship with them, unless of course they were born again somewhere in that time, and than of course, we would together find fellowship with Jesus.
Cliches are the bane of the church, and fellowship has sadly fallen into that vein.
And also, marriage has little to do with being yoked together with an unbeliever. Paul said to remain in the situation we were called, because the unbelieving spouse may be saved by the believing spouse. Be careful to not let men interpret what the Bibles interpreted for us.
I was recently convicted in the lines of those verses and had to switch jobs as a result. I don't drive and depend on the Lord providing my way. Well, the Holy Spirit spoke to me and asked what would happen if that person driving me needed something or asked me to do something that contradicted my Father's will? Well I would have to submit or lose my ride to work, and therefore my job.
That is unequally yoked, depending on unbelievers for things that our Father has promised and will provide. And yes, I get the inconsistency with working a job and this view. But as Abraham, I go out every morning without a clue where I am going, and right now, my Father sends me to a job as His perfect will, and if my employer asks me to contradict the will of God, than I will say good bye to that employer.