I'm sure israel wants to completely ethnically cleanse Palestine regardless of funding, that has been the mission since Palestine was selected as the target for the zionist movement. However, it's our funding and investments that enables them. Do you honestly think israel is self-sufficient? If they were, then why do we send them billions of dollars every year? That's just the tip of the support iceberg, by the way. We also incentivize companies to invest in israel, like Intel and other tech companies.

We also spend a lot of resources destroying and pacifying countries in the region to ensure israel's continued existence. It's no coincidence that countries like Iraq, Syria, Libya, etc have been invaded and/or regime changed. The top recipient of US foreign aid is israel by far, but Egypt is near the top of the list and it's to keep them pacified since they're a major power in the region and had opposed israel in the past.

The US doesn't care about Palestine's existence at all and is only keeping up appearances as well. Just look at the two-state solution that is always proposed but never followed through. Look at all the negotiations that have taken place where the US obviously sides with israel on unreasonable demands and then blames Palestine for not accepting "deals" that no one would accept.