You are mentioning a civil war that happened a decade ago that is by no means exclusive to Hezbollah. I couldn't care less what their founders wrote, but, strangely, they care about the rule of Islam in Israel when their president is a Maronite Christian and their party is one of the parliament members. I can agree that they are Iranian proxies for war against Israel, but it's far from installing Islamic rule. I mean they are also responsible for the secular movement that comprised many religious factions [1]

[1] https://en.wikipedia.org/wiki/Lebanese_Resistance_Brigades