I became a fan at the age of 12, and obviously I was superexited and I told everybody hoping I could have some music discussion with someone. Soon I realized I couldn´t tell anybody without making them start: omg he´s a pedophile, he bleached, he´s weird, he´s a monster, he´s this, he´s that. Hard times. One could think "ok, he´s just a singer you like, why you care so much", but the point is why haters care so much. It´s incredible that a 12 years old must not say she likes the music of someone because she will be looked at with disgust and shock, even from older people.
See my response to MJSweden.
I wouldn't even care about what those people think if I were you. Their words should hurt neither you nor Michael, as they are but a reflection of the speaker's own lack of insight and closed-mindedness. Whatever they say about Michael is completely invalid, as their opinions show that they haven't bothered to properly research the magic and the passion that was his life.
You don't make fun of them for listening to crappy music, so it is understandable that you feel the way you do. However, you should consider the quality of the source before you give proper attention to an opinion. In this case, the quality appears to be of the lowest kind, and thus not worth the mention you have granted it.
Just because people are biologically older doesn't mean they are any better than you. Idiocy knows no gender, age, race, nationality, religion, sexual orientation, etc. Idiots exist in all age groups, and compose the majority of our unfortunate society. Our television programs and general (lack of adequate) culture prove this sad fact to be true.
So be proud to be part of the competently intelligent people, who are modernly an endangered species. Don't worry about what your moronic peers say about Michael. Actions speak louder than words and his amazing actions while he was living drown out anything they have to say about him. In the end, all we have are the facts, and those are that the man you love helped millions of people while the people who criticized him for pointless and even false things die having left absolutely no impact on anyone's life, as if they had never existed in the first place. Remember that and be proud and strong!
I will praise you for being 12 and recognizing good music when you hear it, though.