Frankly I've been curious about all this too. I follow the lore and eventually its going to come up. I don't know how Baine will react or the taurens in general, because they were the earliest druids besides the Nelves and even had diplomatic relations back in Cata when everything started going sideways around them.
It could be especially contentious since all the druids just spent a lot of time together in peace living in the Emerald Dreamway itself.
I'm just glad old Cairne didn't live to see this day.
Edit: Maybe you can say your character was part of a splinter group of Cenarian circle druids who realized they couldn't stop the destruction, but tried to temper the worst of it and let some prisoners escape/not kill some animals--and made doubly sure that the encroaching armies never found the way into the Dream.
I suspect that RP-wise its going to depend on if people feel more aligned with the faction or their calling as druids. I don't for one minute think that all the taurens are going to lockstep behind this, no matter what miss dollar store zombie queen has to say.
If you decide to play that druid instead, you could say that part of his motivation and new drive to heal Azeroth is to somehow see nature come back from such atrocities. With Anshe and Elune as your witness, your own hands shall plant the seedlings of the future; befitting the might of an Archdruid in dire times.