Essentially I chose to say nothing to him. Philosophy is about choice, right? I didn't see how it would have benefited the situation to say anything at the time.
I gathered this because he claimed he was a minister (and had just become one). Therefore he was not someone worth spreading the message with, IMHO. Likewise his beliefs were not doing much for me.
I thought about calling the company he works for and filing a complaint about his unprofessionalism. I could imagine a schenario where someone else might be even more offended, someone of a different faith, etc. Regardless I was happy to have him out of my house and put it behind me.