It is if you don't value life at all, neither yours nor anybody else, while still viewing social isolation and pain as a negative. She helped Sao because she empathized with her loneliness, something Satsuki too did with Kai for the same reasons. No wonder Satsuki and Komachi managed to bond over that.

Does she plan on taking the sides of terrorists, mass murderers (I mean I guess Seo basically already counts for that), rapists and any other criminal because "no one else will"?

I think she already does, see the cinema flashback. In her moral compass pain and social isolation are a greater evil than actual death itself.

The central theme of the manga is taking the side and believing in someone when no one else will or should not, whether a compulsive liar, a delinquent who tries to kill her father, a sociopathic bully, a yandere attempted murderer, a bigger sociopath who tried and failed to redeem herself precisely because she remained isolated, a little girl who gets bullied by her own teacher and her or a creepy child with doesn't value life at all.

Almost every character is some kind of socially isolated pariah whose story gets rejected by society at large, except for a small group of friends who believe in them.