As a god, Shizuha's resolve cannot be more humane. Truly sad, can't blame her at all.
If it is in the sense of her resolve being defected,imperfect,petty,sterile and ultimately decaying down to desperation and violence and revenge(suicide and indirect mass-murder for revenge in this case),then yes it is the humane...the bad site of it...Of course it is even more true for this Kanako but also Sanae(and maybe Suwako too,but she is unconfirmedand,and so it is 2/3 of the Moriya Shrine so far). What is good(godly good?) about burying a lot of innocents to strike at 1 or 2 culprits? More grief,tears,desperation,hurt.Would it revive and make glad Minoriko,and glad those in good relations with? No,on the contrary,it is an offense and disrespec. This all ties together fundamental ethic that it is not lecit nor good to make violence,incl. enabling it or approving it, against anyone,not even yourself.
Back then...*thnk*And little by little, this mountain will die.It's...I was lost. I still don't know what the right thing to do might have been.That goes for the people living here, too.And without followers, even a god can fade away to nothing...Shizuha...It's too late, Miss Keine...There's no point in me going on alone.I'm already done for.Now no one will be able to withstand Gensoukyou's harsh winters.No more autumn...