system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] The X-Men and Killing Dangerous Mutants

       After re-reading the scene in which Wolverine has to kill a young mutant whose only power is killing everything around him I had a question. How often have the X-Men had to do this? 
        Wolverine didn't seem to view this mission as something that hasn't happened before. Is this just a part of the job that everyone on the team has decided to not talk about? The part where they sometimes have to kill extra dangerous mutants and then cover up the entire incident?
gpt
Worth noting that the scene in question isn't from the 616-Universe, but the Ultimate Universe.

Wolverine also wasn't sent to kill the kid as part of X-Men business. 

Ult. Nick Fury was the one who asked Wolverine to do it. Xavier and the rest of the team had no say over or knowledge about the mission, and were appalled when they eventually found out.

Later on, Wolverine threatens Fury with going public about what he did in order to protect the Xavier Institute from being taken over by the government.