While I stand by the statement that calling for babies to be killed as an act of genocide has an extremely antisemetic connotation and I would normally assume someone saying that is doing some antisemetic entryism, I did miss that the bit about the Nakba which better explains their post as coming from actual harm rather than just grandstanding.

However, shit like "death to America" is its own problem, as there isn't actually any relevant desire to ethnically cleanse white people and so it can be understood as either a joke or indeed just about the nation state, as obviously even if you did actually mean to genocide white people for whatever reason there are a lot of people who are not white here or who are literally indigenous, so an unironic "nuke the US" take would be nonsense even before getting to the fact that whiteness is a social construct that can be destroyed without literally killing all white people. And then there's the common criticism of leftists using the imagery of people.in the Middle East as violent terrorists to larp as such, along with using terms like inshallah while wishing for violence.