I can't even explain the pic (nor do I get it!) but Ill try. It's a black and white drawing cartoon. The first panel has a guy jumping and landing on the floor with his chest, pointing to a group of people who are looking at him. The second panel has a close-up of that guy on the floor saying "Grammar." The third panel has the floor guy watching as the group of people start attacking each other, their faces were greatly exaggerated with sharp teeth baring, eyes widened.
I understand how this comic fits into the topic but I don't understand the comic itself! Sorry desumon!
Yep, that's pretty much the gist of it.
The main point of the comic is to state how a random comment by a troll can inflame an entire forum. While nobody is going to call jihad just because someone said "Grammar," it does a good job as social/internet satire.
It was made from a template. Just blank out "Grammar." and replace it with something like "Bush was great." or "There is no god." for the same effect whenever/wherever you want.