The thing is not to come across as antagonistic in any way. Cause the first time he gets sick, someone will be trying to find out who he is connected to, and making him handle or disconnect. The org staffer working with him will most likely steer him in your direction if they are aware of you. That is usually how it goes.
One thing is that when someone first joins staff everyone treats them very well and are quite nice to them etc. But after a bit, he will find that his stats are down, or he didn't feel like coming in over the weekend and people will start to get mad at him and the magic of it all will wear off. Without people love bombing him on how great he is for joining staff, and actually getting mad at him and sending him to ethics, he may come around.
As for what to say when he tells you about how happy he is about CO$ and all that jazz, well that is a toughie. If you show disagreements, then that usually lead down to the path of him not wanting to be connected to you. They instill it in people. Make them think non Scn are bad people.
So I would just be the best friend you can be no matter what. And be honest, honesty is what keeps friendships going. Perhaps you will be able to get him to realize that despite what they tell him, non scn are good and are great people.
do not let him get so detached from the real world. Cause the bubble of Scn seems so great at first. And they tell people how bad and insane the "wog world" is. Believe me I know, I was on staff for a long time and got my mind warped into thinking such nice wogs were bad people.
You could tell him that while you are happy he is happy, you are not thrilled that it comes from something you fundamentally disagree with. Maybe tell him to look at both sides of the story. Perhaps you can get him to see some of the truth online. Who knows.
Done and done,
Sam-osa