This is the page history. Using the K word for Jewish people is antisemitic. There was no mention of his affiliation of IDF, in fact the page mentions he was released from service in order to pursue his academics.

https://en.wikipedia.org/w/index.php?title=Michael_O._Rabin&...

In the article's edit history there are a number of vandalism edits. There is some objectively awful text that was getting inserted.

It got reverted soon after and I suspect you kept missing the worst of it.