They spew like you say all kinds of crap. I doubt they even remember half of the macho crap they spit out. Terrorists posture and huff and puff in fact their scripts.
The kind of terrorism we hear of today in the media is usually Muslim extremist fundamentalist ideology based and financed by Saudi Arabia or Iran.
Although acts of terror and violence have been committed for centuries, terrorism's modern roots can be traced to the French Revolution's Reign of Terror in 1794–95, with its gruesome public beheadings, violent street battles, and bloodthirsty rhetoric. It was the first time in modern history that mass violence was used in such a fashion, but it would not be the last.
I suppose how you define terrorism depends on how you want to define its origins. I think most people on this forum were born in the 1980's so have no clue of any history or political events before then or for example that Muslim on Muslim violence or Muslim on non Muslim violence has gone on since the institutionalization if Islam into states and before Islam Christian and Jewish societies and religions before them engaged in state or regional government or organized politically violence acts of war and terror in the name of God.
We know that in the second half of the 19th century, terrorism arose carried out by nationalists, including those in in Europe as various groups rebelled against their rulers. The Irish National Brotherhood, the predecessor of the IRA initiated bomb attacks in England in the 1880s. There was the the socialist Narodnaya Volya cell in Russia that carried out attacks and is blamed for killing Czarar Alexander II in 1881.
The National Consortium for the Study of Terrorism and Responses to Terrorism based at the University of Maryland accumulated data that showed in the year 2012,Pakistan, Iraq and Afghanistan—accounted for the sites for 54 percent of terrorist attacks that year and another 58 percent of terrorist attack fatalities that year. occurred in India, Nigeria, Somalia, Yemen, and Thailand.
In 2017 if you want to see where most of the terrorist attacks are happening you can go to:
http://storymaps.esri.com/stories/terrorist-attacks/?year=2017
This chart from the Global Terrorism Data base at https://www.voanews.com/a/most-terrorism-victims-are-in-mulim-majority-countires/3478905.htmlshows
shows between 2001-2015 as is the case in 2017 if you look at the map I listed, the no. of fatalities from terror attacks is killing Muslims and carried out by other Muslims.
cont. next post