First off, Fluttershy is best pone. Don't let anyone tell you different.
There's nothing wrong with loving a chatactor in fiction.. it's what great writers do, make a personality so alluring that the reader (or viewer) wishes for them to be alive and there. I was the same way with Prince Diamond in Sailor Moon (wwaayyy back in the dark ages of 1994). Nothing wrong with boys watching MLP:FIM either. My s/o and my 13 year old son watch it and enjoy their adventures.
I have big issues with people hiding behind the freedom of speech line. They don't know what it means. It doesn't mean say whatever you want whenever you want to, it means you can vocalize your disagreement with something and not get arrested or killed for it. Because way back when, when said thing became apart of countries constitutions and bills of rights, people didn't have the rights to openly disagree with laws and rulers edicts. I don't know if people today are purposfully misunderstanding it, or are grossly uneducated about the subject, but it is what it is.
You don't let the trolls of the internet get to you it is not what Ms. Fluttershy would want.