Where were you, Charles?!

After rescuing Erik, he wonders why Charles gave up his Mutation to read and bridge Minds. Leading into a confrontation of how Charles; who had wanted to protect Mutantkind and sought coexistence between them and the Humans to prevent the same Holocaust that Erik endured from happening again, had in his absence delivered a number of Mutants to their deaths at the hands of people like Trask who wanted to build weapons specifically to exterminate the Mutants.

Example of:
What the Hell, Hero?