(esp formerly) the creation of civil strife or violence for political reasons
incendiarism in American English
(inˈsendiəˌrɪzəm)
noun
1.
the act or practice of an arsonist; malicious burning
2.
inflammatory behavior; agitation
Word origin
[1665–75; incendiar(y) + -ism]This word is first recorded in the period 1665–75. Other words that entered Englishat around the same time include: newsletter, recessive, suite, wader, wig-ism is a suffix appearing in loanwords from Greek, where it was used to form action nounsfrom verbs (baptism). On this model, -ism is used as a productive suffix in the formation of nouns denoting action or practice,state or condition, principles, doctrines, a usage or characteristic, devotion oradherence, etc. (criticism; barbarism; Darwinism; despotism; plagiarism; realism; witticism; intellectualism)