Someone might ask, "Did he actually write those words given in Wikipedia?"
The answer would be yes, he is indeed against the Sound of Music.
I must confess I was a bit surprised when I first heard that myself. But he made his case, and as I continued learning about the modern world, history, the Faith, etc. I saw that he was right.
The flaws in The Sound of Music are very deep -- not as obvious as say, the flaws in The Crying Game or Brokeback Mountain. But they are there, and are more dangerous because of how subtle they are.
Anyhow, I would say that any 3-paragraph summary (especially with commentary by Wikipedia, a known anti-Catholic organization) will be unfaithful to the original. The explanation needs to be longer than that, or everyone will just laugh, scorn him, etc.
Like if someone asked you, "Why are you a Traditional Catholic? Why don't you go to your local parish?" but only allowed you 1 sentence for a response. You'd naturally like to explain a bit about the fact there is a crisis in the church, how we have a right as Catholics to the true Mass and sacraments, etc.
Any 1-sentence answer wouldn't be very convincing.