Quote:example that you gave is not an example of prejudice or discrimination
Not true. Discrimination was used as to who was attacked. Only the lebanese or "people of middle-eastern appearance" were attacked by Australians. This was a case of discrimination. Some of the attacked lebanese may not have been perpetraitors, but It is not possible to tell, and it is the perpetrating lebaneses' fault that other members of their people were attacked.
I will use my favourite example which I use against pacifists:
If our country was invaded by Vikings, it is not, and will never be acceptable to not discriminate against Vikings. It is not acceptable to say that they have just as much right to our country as we do. Thats not how life works. Discrimination/prejudice is often justified.
Another example: Criminals. It is correct to discriminate against criminals, because they are the most likely to inflict crime upon ones self, and therefore it is in ones best interest to discriminate.
Another example: People with contagious disease. It is correct to discriminate against people with contagious disease. If you dont you may end up with that disease and then subsequently end up dead.
My favorite example: Sex. It is not reasonable to say that discrimination against people when it comes to chosing a mate is unacceptable. Sexual attraction discriminates on all possible grounds - health, race, age, finantial status, the shape of your body, your personallity and your wit. You'll never get anyone to not discriminate when it comes to sex, and you are severely out of order to think it is always unacceptable to discriminate.