Of course that position would be defended, as it ended up being right. The kicker is that it was right for the wrong reasons. There were right reasons to want to change things back (surge of Keter-class objects, surge of soul flowers), but we completely missed them because we were so obsessed with our wrong reasons. And really, for all that we spouted about how "you didn't ask consent!", we didn't ask consent to change things back from people that very well would have been happier the way things were, like Reimu and Yukari, so we were hypocrites on top of everything else. I raise this question: if we're right for the wrong reasons, does that really count? My math background submits that the answer is no.
We approached the conversation with the goddesses the wrong way. It wasn't "let's talk this out", it was "we're right, you're wrong, this is why, fuck you for daring to think otherwise". This is what I meant by "punch her in the ethics"; we go into confrontation conversations with the mindset that we couldn't possibly be wrong and they couldn't possibly be right and we let our speech reflect that. Notice how drastically Suwako's tack changed when we started to consider that there may have been more than just our side to the issue? That was a Good Thing. Ultimately it probably wouldn't have helped even if we kept going in that direction, but that's our fault for being so blinded to the real issues pre-fight, so.
If Tenshi has something nasty planned and refuses to back down, then I would suggest getting in her way and forcing her to be the aggressor, just as I had planned for us to do to Renko should she have refused to listen to us. Post-conflict forgiveness means heaps more coming from the defendant than it does coming from the instigator. It is possible (hell, it is likely) that Tenshi will get mad at our interference, given her "she would have gotten in my way anyway" line about the knocked-out guard, but if she, not us, initiates the conflict, she won't be able to deny that she wouldn't have gotten her ass kicked if she had behaved properly.