Primarily as a result of the united states' support of israel, attacks on american targets increased in the 1980s. who was responsible for these attacks?

The Shia Islam group that was formed in 1982 in Lebanon was anti-U. S. They were closely allied with Iran. They were suspected to have been involved in U. S. terrorist attacks which included the suicide truck bombing of the U. S. Embassy and the U. S. Marine barracks in Beirut in October 1983 and the U. S. Embassy annex in Beirut in September 1984.