Dems believe that people should not be oppressed. Since Israel has been doing a large amount of oppression for the past 20 years, and they have a lot of power, dems tend to think we should stop giving them weapons.

Diversity has nothing to do with it. If it were actually a diversity issue, we would need to protect the weak, the ones at risk of being wiped out. That would actually be the poorer and more impoverished ones.