Is it not obvious that this is the first half of a sentence and has been selectively edited to mislead?
I don't have video of the Montana rally, but Sanders has talked about this issue repeatedly at the Fight Oligarchy rallies, and here is what he said in LA:
“Israel has the right to defend itself against terrorism, but it does not have a right to go to war against the entire Palestinian people… to kill 50,000 people, injure over 100,000 and destroy the entire infrastructure.”
“And as bad as that is, Trump wants to expel the 2.2 million people in Gaza in order to create a playground for his billionaire friends,” Sanders added, referring to Trump’s proposal to “take ownership” of the Gaza strip. “That is beyond insane, and we will never, never let that happen.”
Certainly, there are many who disagree with this half of the sentence, and that's fine, but it should at least be presented with context.