Extreme left-wing activist Noa Shaindlinger stirred controversy on Wednesday after she seemingly celebrated the deaths of two Israel Air Force pilots in a helicopter accident that happened earlier this week.

"We may have some good news later this morning (hint: IOF drill with casualties)..." the Tel Aviv resident wrote on the social media website, using an abbreviation for "Israel Occupation Forces" that is commonly used by far-left activists in place of "IDF" (Israel Defense Forces).

Shaindlinger's comments, part of a series of incendiary statements that she wrote concerning Monday night's tragic accident and the two pilots who perished in it, drew the ire of the wider netizen community and also commentators in the news media. Following her statement on Wednesday, Shaindlinger's family began receiving threats.

"They are threats by racists, supporters of the occupation and Arab haters," Shaindlinger, who is pursuing a Ph.D. in Near and Middle East studies at the University of Toronto, wrote in response to the threats.

"She has radical ideas," said Shaindlinger's sister, who declined to give her name. "I am shocked every time. It seems her intention is to spark controversy."

Condemnations of Shaindlinger's comments made it as far as the Knesset, where left-wing MK Ilan Gilon (Meretz) expressed disgust at her statements, and MK Amram Mitzna (Hatnuah) said he regretted that such far-left activists are part of Israeli society.

"It is very unfortunate that there are people on the fanatical, extreme Left who probably shouldn't be a part of this country," Mitzna said.