I don't really see a secret diplomacy or a chat abuse here but it looks like the game chat influenced how some of you played eventually. When you told green to attack yellow and he made fun of that remark instead, and it was followed up with a possible ban punishment, the trash talking and ridiculing just went further from there. Green's choice of trash talk only puts him in a bad light though. For now, this is noted for game throwing/ playing to have another player win.
Feel free to put him on your foe list and rate him/them accordingly.