You know, I don't actually find this offensive, and it ranks fairly low on the comedic value scale for me.
He is essentially saying "I'm not interested right now, but I might be in the future. I don't want to tell you why. I respect you and wish to be polite and leave the door open to future discussion"
Sure, the message is padded out and business bullshitty/flowery (depending on your POV), but it doesn't give me the willies..