To say that you would only be ok with this move if Vieria went to one of the best managerial positions in all of football is crazy.
You don't just disagree with my opinion -- you believe it's crazy!
Can you provide me with some examples in recent years, in ANY professional sport, of a manager or head coach leaving a team mid-season for a different head coaching job (excluding national teams)? There might be -- I have no idea -- just couldn't think of one off the top of my head.