It is very pure ritual to putting fire on dead people. It is scientifically true also (ask every japanese they prefer same ritual as us). I dont know why you people make grave and poison the mother earth. Also your dead body can become easy victim of wild animal and water.
Your other story like brahmin and shudar etc are fairytale like britisher told you. I never seen such incidence in my life. I dont know if you repeat your family tradition.
