It is not a question of respect, he is respected, but the game has not been good for a long time. It doesn't look like a blip in the season but more like an exhausted project.
The attitude and level of the players does not help either. That's why a change can be positive, to motivate competition and bring new ideas.
The timing is not good because if they want to bring in Alonso in the summer they can't give to Zidane, they would need a short appointment, a "Solari", which makes it more complicated for the players to cooperate.