I read that in the 60s to the 80s, a lot of civil unrest was taking place and there were so many “protest” bombings (whatever that means) that it became a almo

I read that in the 60s to the 80s, a lot of civil unrest was taking place and there were so many “protest” bombings (whatever that means) that it became a almost normal in some cities (according to articles I found). This might have been a precaution against something like that, considering the current political climate in the USA? https://time.com/4501670/bombings-of-america-burrough/ https://time.com/4501670/bombings-of-america-burrough/ Edited to add a reference and correct a detail