Hate and Jealousy can make a person Mad. This is because, one looses the sense of analysis and decision making. The mind gets covered under a layer which stops its normal functioning.
One forgets everything which is necessary and important and gets entangled into the unwanted and useless activities.
At any stage, when a person is exposed to such situations where his mind starts behaving erratically, one should switch off the mind and take up some activity which he likes most.
This will lead to a normal mind set within short span of time.