There was a plethora of terrorist groups in the 1970s.
The major difference between 1970s and the current time is that explosives in the current age appear to be more powerful, the use of vehicles, and the use of car bombs.
Yes, and there was even a Jewish terrorist group.
Some of the 1970s groups were.
The IRA
The red army faction (Japan)
The Weather Underground (USA)
Symbionese Liberation Army (USA)
Ku Klux Klan (USA)
The Jewish Defense League, a right-wing religious organization, launched 44 bombings and assaults (USA)
The Black Panthers (USA)
Fuerzas Armadas de Liberacion Nacional, (Puerto Rican group in USA)
Baader-Meinhof Group (renamed Red Army Faction, defunct as of 1998) (Germany)
Popular Front for the Liberation of Palestine (PFLP)
Red Brigades (Italy)
Revolutionary Struggle (Greece)
Shining Path (Peru)
Apologies if I have missed some.
http://edition.cnn.com/2015/07/28/opinions/bergen-1970s-terrorism/ Quote:... In fact, the real Golden Age of terrorism in the United States was during the '70s, not in the post-9/11 world. Consider that terrorism in the United States was then a quite common feature of life: There were literally hundreds of terrorist bombings, shootings and hijackings in States during the 1970s. In the 14 years since 9/11 there have been by contrast only some two-dozen terrorist attacks in the United States perpetrated by a mix of jihadist terrorists, neo-Nazis, violent racists and anti-government militants, according to a count by New America.
[highlight]During the decade of the 1970s terrorists killed 184 people in the States and injured more than 600 others. In the decade and a half since 9/11, terrorists have, by contrast, killed 74.
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Between 1970 and 1979 nationalist and ethnic terrorists, religious zealots, and anti-war militants frequently attacked American targets. Terrorist attacks typically consisted of bombings of civilian targets in New York, Los Angeles, and Washington that were also interspersed with shooting sprees aimed at the police...
... The U.S. Department of Transportation found that between 1970 and 1979 there were 112 domestic plane hijackings. While those numbers didn't differentiate between simple criminal hijackings and those committed for political purposes, hijackings were quite common during the 1970s, but since then they have virtually disappeared...