You can start reading Wikipedia.
https://www.tandfonline.com/doi/full/10.1080/13537121.2025.2495417
https://www.theatlantic.com/international/archive/2024/10/hezbollah-war-against-syria/680212/
https://www.mei.edu/publications/hezbollah-and-syrian-conflict
Many Arabs celebrated when Israel killed Nasrallah. https://www.newsweek.com/why-arab-street-celebrating-israels-killing-hezbollah-chief-nasrallah-opinion-1960901
Focus on what exactly?