You really think pulling the "you are too dumb to understand my bullshit" card is effective? Javascript is used to make changes to the dom in response to the user doing things. User clicks button, stuff changes. Have you ever actually tried doing that with a java applet? Have you noticed how 75% of the api doesn't actually work in any major browser?
...and there you go again about lack of support. Have you noticed that Java Applet's just generally aren't supported anymore? We tried it (and yes, all the event handling worked). No one used it and it exacerbated security problems.