Despite Agger describing the incident as a "50-50 challenge," Wenger is reportedly angry solely at him - and not the FA, who are ultimately responsibly for Wilshere playing on and exacerbating the injury.
The 22-year-old consequently suffered a hairline fracture, which is set to keep him out of action for the Gunners for six weeks. But the subsequent fallout from the Arsenal camp might just be a case of misplaced priorities.
How can Wenger, said to have absolved the FA of all blame, focus his wrath on Agger when the Liverpool defender was simply doing his job?
If Laurent Koscielny or Per Mertesacker had gone for a challenge at the Emirates Stadium and an opposition player had ended up worse off, would the Frenchman be taking the same stance?
After all, the biggest issue here is not the tackle or the injury - it is the incompetent decision to keep Wilshere on the pitch when every one of the 65,000 or so people at Wembley could see he was injured.
The 64-year-old Gunners boss is said to be taking such a lenient approach towards the FA because Wilshere declared himself fit to carry on. But since when did players tell their manager how to run the team?
Wenger has had enough experience with rushing Wilshere back into action to know that the player's word is not always the wisest, especially when they are driven by adrenaline and the desire to stay on the field of play.
The real culprits here are the England staff for allowing the 22-year-old's injury to develop into something serious. And for that, Agger deserves no blame. He was simply an international defender going for a ball he thought he had a right to get.
Wenger's fury, then, is misplaced, while it's all a bit convenient that it is aimed at a first-team regular of a close Premier League rival...
image: © Jenny Leigh