who has the right to judge

because someone does something it doesn't mean it's right, right? then why do people keep beliving that everything that muslims do is right according to islam? you can't do it like that. it hurts me to hear what people thinks about such a beautiful religion. they think it's violent but i know islam is the most peaceful and righteous religion you can practice. if you live a life only by living as a muslim should you would be a wonderful person loved by everybody around you for what you are and how you behave. think about it, read about and understand it. after doing that you have a right to judge.