I believed this is the way of life, the way of the world and the
way of the universe. You are a person of strong opinions, with
crowds of different views. I hope you're a capable, hardworking and
intelligent person, if so, you will undoubtfully succeed in
life.
Otherwise, looking at your situation, you could be more forgiving
to other's viewpoints, to each his own as they say. Everyone has a
choice of voicing their opinions, so do you. You did what you
thought was right, to tell them what is right in your opinion, but
also in a way curbing/stopping their opinions of what they feel was
right. You could not accept their comments, you started the "war",
don't whine.
copying of homework is not retarded, it is an absolute shortcut
to lazy people.
copying in test is not not good, it trains other aspects (stealth
skills) its simply a test and display of how skillful are you to
not get caught, except its a high risk affair especially if done on
Exam papers.
bitching at stuffs is so important! it releases us of toxic that
forces many depressed souls to commit the unthinkable..
Of course, I'm not trying to be funny or offend you, just to let
you understand the many many viewpoints people has, had and will
have in our life to come.
Be more understanding my friend. 
