What is the pleasure that they derive from it?
Our scriptures irrespective of religion have always said that the primary responsibility of a human being is to love and help others. The worst of the lot are the manipulative ones who puts in thought of negation in our head to ensure that the help does not go through. Such people never change their thought process even if the truth is staring at them right on their face.
Anyone who is reading this always remember
IN THE END, ONLY KINDNESS MATTERS