It's dishonorable to damage a memorial.
There is a war taking place and Greg doesn't agree with the war at all.
Greg wants to voice his opinion on the war.
Greg writes an editorial which is published in his local newspaper.
Greg spray paints a memorial statue with with anti war quotes.
Greg is respected by both those who do and don't agree with his opinion.
Greg ends up in jail for defacing public property and also loses his job.