It is generally a bad idea for a major leader to respond to a rant like this. Such a response just lends more importance to the rant.
However, it can't hurt for other people to try to write responses. If you want to do that, here are a few tips:
* Don't organize the response as a series of quotations and comments. Instead, write a single unified article. Quote from the other article only when it serves your purpose.
* Don't try to argue with every little point. Pick two or three important points and write about them.
* Attack the position stated in the article, not the writer.