Why is Israel angry at Lebanon?

I am indian national. I love israel and israelis. First thing i want to say that india and israel are best friends today. Both of these nations are blood bros. We indians have great love for israelis. Jewish communities in india had never been discriminated. We love israel and its people. On the other hand many islamic nations like lebanon hate jewish people. Many islamic nations don't like israel. Once president of iran said that he will destroy israel completely.