Rather "that guy is EVIL because he's an unappologetic agent for the otherworldly power that seeks to tear down everything and bathe the world in blood, fire, and flith".
So... like Shosuro, Mirumoto Hitomi, Hida "muh FEELZ" Kisada or Fu "I got it for the fourth time!" Leng? I must admit, most of the evil guys in the setting fill the "spineless *sshole" bill rather than the "agent of darkness" one, but I'm not exactly sure if the former is better than the latter. I mean, an obviously evil guy gives you a straightforward fight, but you can't put down people like Isawa "zeeerooooo reeeegreeeets" Tadaka without causing a big mess - if you even get the chance to deal with them.
Any issues with those characters don't in any way mitigate the issues with attempts to make the Spider servants of literal hell AND a clan-in-good-standing of the Emerald Empire at the same time.
(And issues with Fu Leng REALLY don't mitigate issues with the Spider... )
Looking at the direction of the clan in AEG's Obsidian notes, the part about servants of hell doesn't really work that well in reality. The idea of hell on earth is simply over blown by fear or ignorance. It more along the lines of a forced change and possible time of some upheaval in Rokugan, similar to that of the death of the emperor by Shoju. This also doesn't take into account many different parts of the clan. In particular, a number of spider monks.
Again, just read the Spider Obsidian notes. They pretty much discount everything that's been argued against the clan.
Edited by Kubernes