Too offtopic, use google, first and second points are widely public information, the third I said "I guess", it's a guessing, so no public source available about it.
1.
Kibbutzs had a history of leftist ideology and leftist way of life, far-left communist ideology, they are not all, but mostly.
Vivian Silver, a Canadian-born Israeli activist who devoted her life to seeking peace with the Palestinians, was confirmed killed in Hamas’ Oct. 7 incursion into southern Israel.
apnews.com
A Minnesota native who had protested Israeli military action in Gaza and her husband were murdered by Hamas terrorists near the Gaza border.
nypost.com
Here a discussion about that, with more links:
2.
Just a example:
en.wikipedia.org
More than 100 civilians dead in just that attack to one Kibbutz, but Oct 7 was plenty of attacks to several Kibbutz. here a complete list:
See the tablet in Location field that start by "Kibbutz"
en.wikipedia.org
3.
It's a guessing, but you dont need too much source or too much guess to figure out what thinks Israel military high ranking warmongers about Jews who are far-left and have propalestinian views
You post plenty of information about Israel/Palestine issue, so it's hard to think you dont know this, trying to mix far right settlers to unrelated leftist propalestinian Kibbutzim people, I dont know if you're trolling when ask for sources, but I reply you because I appreciate your posts plenty of information about the topic.
