If your class is boring and you need to shake students up, using racial slurs is not the way to do it. But you know that.
If you want people to speak up and say something’s wrong, and then your student gives you a whole damn presentation about what’s wrong, you don’t then condemn him for being too sensitive (TO THE THING YOU’RE CLAIMING YOU WANT YOUR STUDENTS TO BE SENSITIVE TO!!).
And to Maleek’s white classmates, you should be thanking him for the education.