What is the test for a person to be found guilty of making a threat against someone who has committed acts of terrorism?

carrying it out,' (3) that the threat -- which may be 'made verbally, in writing, or by means of an electronic communication device' -- was 'on its face and under the circumstances in which it [was] made, . . . so unequivocal, unconditional, immediate, and specific as to convey to the person threatened, a gravity of purpose and an immediate prospect of execution of the threat,' (4) that the threat actually caused the person threatened 'to be in sustained fear for his or her own safety or for his or her immediate family's safety,' and (5) that the threatened person's fear was 'reasonabl[e]' under the circumstances." (People v. Toledo (2001) 26 Cal.4th 221, 227-228.)