Hizbollah was established as a resistance movement after the Israeli invasion of Lebanon in the 80s.

It is really safe to say that Hizbollah would have never existed if it wasn't of Israel.

Simple; occupy people's land and torture them they will develope resistance. This goes with all the international laws. Occupation resistance is a sacred duty respected and protected by international laws.

It was not, however, a surprise when the USA declared Hizbollah as terrorist organization. After USA government has always been an Israeli puppy does what Israeli government asks it to do even against the average American interest. for this I will elaborate with examples soon.