Saying whether what DISCO with Mudd was good or bad choice is really up to the viewer. Personally, I don't find a criminal who peddles women and is a conman to be loveable or charming. Rogue? Sure. Loveable? No.
He didn't "peddle women." Viewers today misunderstand "Mudd's Women" as sex trafficking because they don't remember the historical practice of wiving settlers that it was based on. The program to recruit women to move out to male-dominated Western frontier settlements was the exact opposite of sex trafficking; the goal was to make the communities
more wholesome and civilized by encouraging reputable women from Eastern cities to voluntarily migrate to the West, take community-building roles like schoolteachers and seamstresses and the like, and hopefully allow the formation of lasting marital bonds so men wouldn't have to turn to brothels as much.
Certainly Harry's con game was corrupting the intent of a settler-wiving program, but the episode made it clear that Eve, Ruth, and Magda were willing partners in the con. They (or at least Ruth and Magda) were portrayed as golddiggers, women using their sexual wiles to win rich husbands. In that paradigm, it's the husbands who are presumed to be the victims, manipulated by women who pretend to love them but just want their wealth. Perhaps that's another aspect that's hard to recognize given cultural shifts since the 1960s.
And you really can't find con artists charming? I guess there must be a whole genre of fiction you don't like --
The Sting, Ocean's Eleven, the
Mission: Impossible TV series,
The A-Team, Remington Steele, White Collar, Leverage, etc. Heck, Han Solo and Lando Calrissian are con artists. The Wizard of Oz was a con artist. Angel Martin from
The Rockford Files, Booster Gold and John Constantine from DC Comics, Lupin the Third, Quark from DS9, Beckett Mariner from
Lower Decks, Vala from
Stargate SG-1, Captain Jack from
Doctor Who. Heck, the Doctor is a con artist a lot of the time -- psychic paper, false identities, etc.
That was a war... people do things in war to protect others or for their own survival. Doesn't make him a 'violent killer'.
How are you defining those words? Violence is doing harm. Killing is causing the cessation of life. The definitions are not conditional on the state of mind behind the actions. You're not any less hurt or dead if the person who did it to you felt bad about it.