To be fair, the Warrior of Light and many of his allies are canonically shown to smile, cheer and show pleasure when faced with the prospect of taking the fight to not only the Garleans but certain other individuals and factions as well. He is by no means on the same level as Zenos but at the same time he isn't exactly opposed to doing some very dubious things such as infusing a weapon with the aether/souls of slain combatants. Of course, that may be brushed off as 'not a big deal' but I bet the shoe would be on a different foot if Garlemald happened to be confirmed to be doing similar things...

At the end of the day if we consider every side quest as 'canon' - and I see no reason not to do so - then there's definitely shady elements such as the above scenario to consider.