I think a lot of Villa fans (If he does ultimately go) cannot just comprehend or 'get' why he would want to leave as he has been here a long time, signed a new contract(Even though contracts are essentially meaningless a majority of the time in this sport), etc.
Jack is adored by all Villa fans and it will be somewhat emotional if he goes. But as others have stated, at the end of the day, Aston Villa was here as a club long before Jack was even born and will be here long after we are all gone.
Not the owners fault if he goes. Yes they can try to offer him an improved deal but I'm sure even still can't match up to what Man City can offer him.
If he goes, thanks Jack for your time at Villa and let's focus and cheer on the rest of the squad.