"With Spock's understanding, audiences would at least need to wait a moment to consider the goals before damning Sevrin's group."
Rewatching the episode I found it (positively) amazing how open-minded Spock is towards Sevrin and his followers but then again, Spock was the prominent "alien" / outsider of the series, totally entitled (and expected) to cast a different opinion or point-of-view on certain issues than his fellow shipmates which also ensured this character's outstanding popularity.
Occasionally a victim of prejudice himself (McCoy in "The Ultimate Computer": "Finally the right computer came along" ), Spock was always good to battle ignorance: "Computers make excellent servants, but I have no desire to serve under them!"
Come to think of the worst episode I'll always find myself ending up with the first one aired, "The Man Trap". The series premise was to seek out new life, not to destroy it. Fortunately, the producers seem to have later realized what a terrible episode the first one aired had been and redeemed themselves with episodes like "The Devil in the Dark" (a paradigm shift) and Spock's ongoing concern for the destruction of sentient life forms.
Needless to say, that one of the most idotic decisions of CBS, IMHO, is the TOS(-R) presentation on Blu-ray disc in the airdate order (at least, presenting the episodes in the stardate order could have qualified as "imaginative").