John the Fearless was quite ambivalent. Yes there is a lot of tension between the two groups and yes to see the armagnacs slaughtered would have been quite pleasant for him. BUT french, even burgundians, DO not like english. Remember that his own father was popular because as a young boy, he was very brave at poitiers. And if he didn't officially sent reinforcements at Agincourt, he didn't forbade his men to go there either. And his brother died at agincourt.
Indeed very true, still Louis will have his work cut out for him, especially if Henry V advances as rapidly as he did otl