Was suicide induced by the interlopers to harm the actor, Robin Williams, who hanged himself with a belt over a doorknob?

This is very much the case. The general strategy is to look for all people who may be despondent and then ramp up those thoughts, those feelings, and sensations, and to implant the idea of taking their own life. They can do this readily with large numbers of people and will be successful with a certain percentage in a given span of time and is an exercise that they do over, and over, and over again. So it is a policy that bears fruit and will chip away at human society through attrition and this is the goal they are after.