By request from auggie18
, I present this rather awesome fight between Jean Grey and Sabretooth from (Adjectiveless) X-Men #28.
Some context. In order to stave off his bloodlust and maintain some semblance of humanity, Sabretooth has been using a telepath named Birdy to give him "the glow", a mental blast which functions basically as mutant prozac. When she's killed he decides the only logical conclusion is to go let Wolverine "do what needs to be done". Problem is, just a few issues ago Magneto went and ripped out all of Wolverine's adamantium and Logan's not in much of a position to do anything to anybody.
With Sabretooth on his doorstep, Xavier enters Creed's mind and discovers that he perfectly remembers all of his past victims, which is driving him even further into psychosis. Xavier decides that Sabretooth can be redeemed and thus they cage him up in the mansion and therapy begins.
This goes over about as well with the X-Men as you'd expect, but one member in particular is having serious reservations. After comforting Jubilee in the wake of a major Sabretooth-themed nightmare, Jean gathers Scott, Hank and Ororo at Harry's to talk about it. With all the questionable actions Xavier's taken lately (from having Storm steal for him up to the assault on Magneto), is this what they should be doing, or just another example of Charles losing it? The discussion goes from "well we took in Wolverine and Rogue and worked out okay" to "Sabretooth's powers aren't out of control he's just an evil guy who likes to use them to torture and kill people".
Things seem to keep getting worse with Sabretooth going out of his way to deeply freak out each and every person he encounters. Jean finally snaps and confronts Xavier directly. That's when Scott figures it out. ( Cue drama, as only the '90s can do it. )