Can anyone explain this?

Will someone please explain why and when, in this country, it is suddenly acceptable that any form of human rights violation is acceptable, before or after a person has had a trial? Because the thing is, none of the folks who were detained for G20 had a trial, and yet everyone seems to think the treatment they received inside the detention centre was suitable for criminals. Plus, since when does Canada believe that letting people go hungry and thirsty, and preventing them from being able to even sit down, is acceptable treatment for criminals, even?