Yet yo do
The answer to #1 is no.
The answer the #4 is yes, it's very related. For me it matters not who attacks me, you or Pyth. I need to defend myself in any case. So having a mega army at my border means I need to take counter measures.
The answer to #5 is obvious, why would Mictlan or anyone else risk attacking you?- Your nation is scary but once you moved to war with me a lot of the fear factor was gone so now you're actually a fair target and I hope Mictlan would benefit a lot from expanding into your lands.
The answer to #6 is that it's BS. How exactly was I slowly conquering Pyth when we were, a- at peace and b- I was constantly offering him better diplomatic ties. I had no intention of attacking Pyth whatsoever. Just check this thread to see how many times I offered to him to back out of his war declaration.
Peace is always a good option. As I said I'm willing to negotiate for a peace agreement with Pythium if he is so willing.
As for Jotunheim, I think too much blood has been spilled: Pangaean & Caelumite. Also, too much is in motion (Caelum is managing to survive and hit you back, Mictlan joining the fray). It will be difficult and possibly devestating to me, Mictlan and Caelum if we were to, now that things are too hot for you, back out. It will only give you time to regroup and restrengthen and pick us down one at a time at your leisure.
I'm afraid such a move would be suicidal to us and we can't have it.
You should know that a lot of what came to pass is the result of Caelums cry for help. It took a very long time for such help to come (due to fear factor that I admit to have shared as well

) but now that it did, it would be stupid to back off.
I'm sorry friend, looks like the camps are made and the battle lines are drawn, now all that's left is to see how things play out.