For people saying they study an art of peace, and many claim to have become better at conflict solving in their personal lives, some posts here sure seem to do their best to make this discussion as hostile as possible.
Well, it's your choice about whether you want to characterize these posts as "hostile". I'm not going to go back and scrutinize the thread, but I think that in some cases, your basis for assessing hostility seems to be that someone (who has experience in aikido that you don't) didn't agree entirely with your take on things, or who said anything that disagreed with your proposed course of action as the best way to go. These are uncomfortable voices, but if you can find a way to listen to them (and defuse your own inclination to characterize them as "attacks"), uncomfortable opinions now will probably save you from some pain and disappointment later on.
(as an aside, I'd be careful about playing the "art of peace" card more than once in a very great while, and that in situations where it's clearly warranted, as it is not here. It's a bad habit whose most likely outcome is layers of self-delusion.)