According to this piece in NRG, Harav Dov Lior is furious that Jewish Home leader Bennet doesn't listen to him. Yesterday the Jewish Home decided to back a proposed law that would expand the 150-member body that elects the two chief rabbis to include more women and public representatives. The law is seen as an attempt to increase the chance of Harav David Stav - the more liberal candidate for Chief Rabbi.
Why is Harav Dov Lior's anger so ridiculous? lets look at some pre-election headlines:
Harav Dov Lior Doesn't Support the Jewish Home, Supports Otzma L'yisrael
Oh? so if Bennett had actually listened to Dov Lior, he would have voted for a party that didn't pass the election threshold.