firebombing       
noun [ C or U ] uk/ˈfaɪə.bɒm.ɪŋ/ us/ˈfaɪr.bɑː.mɪŋ/
 用燃烧弹袭击
an attack with a firebomb (= a bomb that causes destruction by starting a fire rather than exploding)
  There were shootings and firebombings directed at their community. 他们的社区遭到了枪击和燃烧弹袭击。 
 There is a broad spectrum of animal rights activities that range from lawful protests to firebombing. 动物权利活动的范围很广,从合法的抗议到燃烧弹袭击都有。 
 - More examples
 - A gang leader was prosecuted for murder after ordering the firebombing of a judge's home.
 - After the firebombing, police found two other suitcases with undetonated explosives on the train.
 - Firebombing is terrorism, plain and simple.