You did nothing wrong. You explained the situation to him and you both have different ways of interacting w/your son. At least you both have stated what was on your mind w/respect to your son.

Also, by responding back and addressing his response back to you was very good. At least he can see that you aren't attacking him or making him out to be the bad guy.

Continue to keep the communication lines open. You are doing great.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.