PJCDude, you told a trans person who is being harassed for being trans to stop being so sensitive. I don't know why it's so hard for you to understand why that's a really stupid thing to say.
What I did was tell her that the slurs and offenses she receives over a videogame should be ignored by her, and that she SHOULD NOT be so sensitive. I did not say "Stop being so sensitive". English is your first language I'm genuinely amazed that you do not see the difference.
I don't know what kind of worlds you live in, but here nobody is going to take special care of your feelings later in life. Obviously changing how much you get affected by something is not done overnight - it takes times, and that is what the person in particular should aim for. Because one day it might happen to her in real life, and if she barely manages to cope with it in a videogame, the effects from bumping into it first hand would be devastating.