Earlier quoted context omitted.
Hezbollah exists to destroy Israel, not Iran. Iran current theological dictatorship just wants to see itself as leader of the Islamic world and uses Gazans as welcomed victims, just like Hamas. It famously fund terrorist activities like Hezbollah.
in the grand scheme of things, Hezbollah is a gnat going up against a fortified nuclear power. Israel could eliminate them in a heartbeat but actively pursue the avenue that glorifies Hamas and hezbollah and keeps them active and new members pouring in. It's hard to hate Israel when they are peaceful, don't encourage their "settlers" to colonize neighboring countries, aren't blocking aide, aren't blowing up hospitals…
Who really needs justification is Iran for funding these militants.