Trump doesn't even know the basic details of the government who's leader he's hosting or of the war in a country that has 10 US military bases. The entire reason for the CIA/Saudis to fund & arm rebels & terrorists in Syria was to remove Assad & Hezbollah to weaken the Iran/Syria/Hezbollah axis.
Hezbollah are part of the Lebanese government and fight against terrorists in Lebanon and Syria, primarily to defend Lebanon.
If they hadn't engaged the salafi jihadis, Lebanon would now likely be under the control of ISIS.
Map below is from early 2017 & shows where Hezbollah are positioned. Some units have integrated with the SAA and been chasing takfiri (al Nusra/ISIS maniacs) across Syria & even into Iraq. Total Hezbollah body count since entering the Syrian conflict in 2012 is estimated at ~4,000-5,000.
Hezbollah's military wing lays low. What we know about them is that they are a disciplined force, trained by the IRGC. Some believe their missile arsenal rivals all but a handful of countries. The video below shows them in close-quarters combat in Zabadani, about 3km East of the Lebanese border.
Below is a video Hezbollah made to taunt the takfiri. Lyrics are loosely trranslated as:
'Oh takfiri, Hezbollah is coming to make your days dark'