how can???

Today... something happened... and i can't believe it happened... ok... during assembly, one of my friend was very excited coz we were celebrating racial harmony day... and there was going to be lots of food... so she went, "Food day! Food day!" and very unluckily... she got caught by a teacher who wanted to catch people who were talking... so... my friend was told to present an article during IRP. so then... she spent lots of time preparing for it... and other classmates also gave her opinions on wad to talk about the article she was going to present... so... we were hoping she would do well... then... after a while, it was her turn to present... so she went up and started talking about an article... when she finished her wad she had prepared to say, she looked at the teacher as if asking whether she could go back. The teacher actually brought her to one side, asked her wad she actually wanted to talk about and commented that her chinese was very weak and said that my friend should not even be in this school. and wad was worse was that one of my other classmate said that she noticed that throughout my friend's sharing of her article, that teacher was talking to someone else and not listening at all. How could the teacher say that my friend should not be in this school because her chinese was weak and there is even a possibility that the teacher did not even pay attention to my friend's sharing. I mean... even if my friend's chinese is weak... the teacher has no rights to say that she should not even be in this school... how how how could she say that? that is like how demoralising and insulting. I just can't believe that that teacher actually said something like that to my friend... Atrocious...man...