He actually wasn't evil, he was trying
To unite the fallen under one banner and save his species. How is that bad? Personally I would join Skolas in bombing the city from orbit. -blam!- the traveler and the speaker.
I kill Guardians I love doing it, nothing gives me more of a rush than killing Guardians. You could say I'm rogue but I know the truth about us.
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Wasn't one of his goals to unite and steal the great machine (the traveler) back? I know this is the House of Kings end goal, so the fallen may just jettison you out of an airlock from attempting to harm the traveler.