How to change people's mind?

I was wondering all times that some people are good as gems and some people are hard to understand and we consider them bad and evil. why there is so much changes in people's thoughts and mindset. Recently I came across a beggar women. She was begging all the way through the usman road. I felt pitty over her and gave a 10rs. Which was the only change I had and everything I had was a credit card. But can you guess what she did?. Definitely she didn't praise me. She said that, "a tea is 20rs, and this 10rs is not enough for me, give me a 50rs". I told her that I don't have cash and I pleased her to keep that. I bought apples already. She asked them. I gave them to her. She went away. But she was scolding me that, he even can't afford a 50rs. I don't mind her words but, she is begging for her life and many people like her does the same. But demanding like this shows. The evil in their heart. Begging is their rights. But they even don't know many of us are really beggars. We even don't have money in purse. In the meantime, many boys come in bus. Just to rub girls, and in my opinion, girls are also responsible for that problem. Nowadays girls don't wear proper dress they show up their body. It ma everyone urge to do so. Many things and many habbits have to be changed. Change the mind to change the world.
                     Lets spread the breeze of love