If the so-called Palestinians had a case, wealthy Arab states would be rushing to give them support and aid. Instead, the larger Arab world has proven over and over again that it wants nothing to do with them.
Palestinian leadership could always simply accept the autonomy within Israel that has been offered to them instead of continually trying to empower the same old PLO/PLA gangsters who have been shaking their own people down at gunpoint for over seventy years.
What wealthy Arab states? The USA bombed the entire middle east for one man, everyone should help people in an humanitarian crisis. That's why everyone puts sanctions on Russia, relaying on one or two states to support a entire country won't cut it and is extremely unfair.