I see why he is uncomfortable and didn't want to be there.
Example: You leave your home country for another country. You leave that country to go back to your home country and now these two countries are at war. There's a deal between them two to where you must go back and talk to the people. It'll be uncomfortable because your are with the opposing country now.
Same thing is with Christian. Except WWE and TNA have always competed, but it's still the same feeling.