Ultraman

大眾安全? Who's gonna kill those kids? If so, they could have been killed long time ago already, no need to wait until now.
I think the headmaster is worrying for no one to pay their school fees.

Ultraman

It's simply different.
A private school concerns criminal background of their students themselves as well as their parents/families, it's more like a reputation thing rather than a concern of those kids would commit crime at school; a country will very likely refuse immigrants applications if they already have a criminal record, but what's wrong for the descendants of criminals if they themselves have commit no crime at all, will they be kicked out from the country?

Similar concern may apply to, an employer may fire an employee once he/she realizes that the employee's family has serious criminal background, even not the employee himself/herself.
It's not a true or false judgment, but the situation is fairly understandable.

Ultraman

Why people have criminal records can't be immigrant?
Why people have criminal records can't be cops?
Oh I see, it's all baseless discrimination and unjust bias?

You did nothing wrongful, but your father or mother is a well known criminal, and so you are not welcome in a private school. Is it really difficult for you to understand?

Ultraman

Because you claimed you know better. OK, let me ask you:
A current cop's family member just committed a crime recently, would that cop be fired?
Since he/she is already being a cop but not under the procedure of application, any of his/her family member's behavior won't affect him/her at all?

Of course I'm not going to argue with you in a childish way, and never did. The "nature" of this comparison is never been the same. However, the concept is: the government concerns about the public safety and there would be conflicts between the cop (in the example above) and his/her criminal family member(s); the private school concerns about their school reputation, no matter the student is only under application or already in the period of studying.

As I said, this is very understandable, not to comment right or wrong.

Ultraman

You always like to use the word "discriminate" or "discrimination" in an abused way. That's your style, huh?!
As you said you know well, I thought you should know the authority and stands for a private school are different from a government one. The case happens in a private school might not be the same situation in a government school. And it is not always related to your favorite term/fact discrimination.