There is no such thing as empathy anymore.
http://www.allaboutdepression.com/cau_03.html
But there is stupidity.
Separated identical twins have an incredibly higher chance of depression than two people chosen at random. That proves there is a genetic factor. This means that by any definition it is a disease.
Some of the comments here condemning Williams or anyone else who commits suicide are flat-out ignorant, and nasty, as well.
How about empathy for his family?
The worst response to suicidal thoughts is to join in a pity party with the depressed person. That simply reinforces his temptation of hopelessness and independent thinking separate from God’s Plan.