Communist here, socialism and ethnic nationalism are not mutually exclusive. However people who believe in a right wing ideology like hard ethno nationalism usually end up betraying key philosophical principles. Socialists , especially marxists want to advance society to communism, that is the goal. That often entails abandoning previous societal structures like nation states due to them being mechanisms of the bourgeois to exert control . The article fails to mention how they actually betrayed socialism aside from themselves moving away from the name (a “Jewish state”). I suppose perhaps they lacked dictatorship of the proletariat due to their discrimination of other proles.
Were they socialist? Yes. Do they prove socialist suspicions of nationalism, especially hard ethnic nationalism? Yep.
The kibbutz we’re a wild mess of very conflicting ideologies, but regardless they had improved the standard of living of people living in them, were a key part of Israels defence for a long time, essentially laying the ground work for Israel and they up to the 70s had a higher standard of living then people living in Israel. Some of these groups still exist today and they largely ended due to the adoption and slow integration of capitalism by Israel. Internal and external pressures led to its collapse. Not some people being “lazy” (it’s a pretty shitty commune if you didn’t straighten shit like that out early on)