Sure earth burial of deads is not the best. Do you remeber the earth quakes in 90s and plague immediately after. Plague which was not existant for centuries spread like wild fire. It was from burried bodies and not from ashes of Hindus.
Islamic festivals are also psychologically negative. One cant feel good about killing animals. Humane people dont want to see the horrific scene of cutting the throat of some living thing(animals and humans).
Human rights in Islam? What are you talking about? Non-believers are considered enemies!!!
Instead of poluting this forum, checkout http://www.faithfreedom.org and have an intellectual and logical debate and show your mastery in islam and kuran.