One of the "victims" was an Iranian ambassador to Syria. They are an arm of Iran serving their interests within Lebanon which are in conflict with the interests of the Lebanese people. They fight Israel but then hide behind civilians within tunnels.
For once they became a direct target without the ability to hide behind anyone. Just recently there was declassified intel on them planting bombs within Israel trying to assassinate politicians. They already bootstrapped a phone in the past too.
The reason they have popularity is due to funds they get from Iran which they use to provide loans to poor people. To make this even more attractive they push for a situation of dependency and poverty so the poor would be even more dependent on their loans. Lebanon is in deep distress (financially and politically) and these are the a*holes pushing for it on the behest of Iran.