I believe people who share your views are the ones in need to be put down, immediately, and with the cheapest drugs on the market so the taxpayers don't feel the weight of your ignorance.
Your grandma is now old, which means she was once young and worked and created a family of young people that now contribute to the society. What do you do? Does it mean that when you are old you should be put down? They might not contribute but noone has the right to say wether they are useful or not. Don't forget that she brought to life the person who gave life to you, and unfortunately failed to raise you the right way. Old people are to be respected as they have contributed their entire lives and now deserve to live the few years of their life in peace with their family, and you are all she has, and you should consider it an honor to have her with you. And i suppose you are old enough to be making decisions in your house, because if you're a stupid 10 year old, your parents need to beat the living SHlT out of you rapido.