Phonetic spelling is central to the joke. Writing "England" communicates nothing novel; writing "INGERLAND" evokes a distinct linguistic register. It pulls from postwar terrace dialect, mid-century tabloid headlines, and the cadence of traveling away supporters chanting through megaphone feedback.
The syntax reflects terrace reality. In modern elite football, tactical discussion is dominated by expected goals (xG), positional play, and rest defense. The average spectator online encounters tactical maps and passing networks on a daily basis. "CAM ON INGERLAND SCOR SOM FACKIN GOALS" operates as a violent rejection of that technocratic football culture. It flattens deep tactical debates into a single primal demand: put the ball in the net.
Fans do not quote the line out of genuine malice. They deploy it when their team produces endless possessions with zero shots on target. It is defensive irony. By shouting the stupidest possible phrase before their rivals can mock them, England fans claim ownership of the punchline.