After reading around, it appears some people reported being able to complete the mission. They said the guy spawns on a street corner, so as long as you watch your shooting (its one of those "shoot from the back of a speeding truck as the AI drives" missions), don't cause an enemy car to explode near him, and if the nazis dont shoot him...you can finish the mission.
So I tried it and amazingly made it through in a single go. I never saw the guy, and apparently the Nazis didn't kill him. So...hooray! I can continue the game!
The Nazis destroyed the strip club. Those fuckers are going to PAY!
EDIT
Well, good thing I was able to beat that mission since I didn't realize just how close to the end I was. Anyway, I beat the game. Though I'm not done with it yet. I did 100% of the story missions, but only 26% of the "free play" targets. Around the city are all these sniper towers, radar placements, AA guns, etc all usually guarded. My job: blow them up. I have a LOT of them still to do.
And they fixed the strip club. Take THAT, you fuckin' Nazis!
I've made my way to...
...The mission where you get into trainyard, hop on the train, blow up radio car, and go after the Doctor on the front car of the train.
I made my way to...
Hop the rooftops and bug 7 radios mission.
Finished that mission and stopped.
Man, this game's been awesome so far. And the missions really have been nothing short of epic.