The problem is the performative attacks on the only party that will ever help them.
If they say “We just want Democrats to call for a ceasefire”, then when Democrats call for a ceasefire it does not help Palestinians to respond “Actually that’s meaningless, fuck the DNC unless they embargo Israel”.
Do you really think Palestinians who wanted America to call for a ceasefire suddenly changed their minds? No, it’s a self-indulgent response by cynical Americans. And all it does is make Democrats question why they should put any more effort into helping Palestinians.
Look at every successful activist group. None of them ever said “You did what we wanted? Fuck you.”
They all say things like “We applaud Lily Ledbetter/background checks/gays openly in military/automobile emissions standards. They are a good first step towards women’s equality/gun control/LGBTQ rights/preventing climate change. We will support you, and let’s work together towards the next step”.
As another person put it, you can be a partner with Democrats or a problem for Democrats. Gaza activists generally want to be a problem for Democrats. But the Democratic Party pays a lot more attention to its partners.