His basis for not wanting you to watch boils down to him believing it's impossible to be a good Christian if you watch the show.
This is the old Jake. Those were the days.
Source: critikeurs.fr
Angus T. Jones, who plays Jake Harper on Two and a Half Men, is apparently a very serious Christian. He recently did a testimony of his awakening, which was posted to YouTube. In the testimony he praises God and also admits he hates the show is he on. Sounds like he is begging to be fired.
Here's the part in the video where he dissuades people from watching "Two and a Half Men":
"Please stop watching it and filling your head with filth. People say it’s just entertainment. Do some research on the effects of television and your brain, and I promise you you’ll have a decision to make when it comes to television, especially with what you watch."