If you want to enter a house, do you use the door or the brick wall? In this scenario, the republicans are the brick wall and the democrats are the door. In theory, the door is more willing to allow entrance. How you're framing this is that using the door is an attack on the door. This is the same attitude conservatives use when people critique the US where they'll respond with "America: love it or leave it".
As for punishing minorities, I'd take democrats more seriously about their claims of standing up for minorities if they weren't so quick to ignore them or throw them under the bus. It was Palestinians and others in Arab communities who were driving the uncommitted movement. It was a movement that simply asked that people mark uncommitted during the primaries where Biden was running practically unopposed. This is the lightest of resistance ever, did not threaten the presidential election, and clearly delivered the message that people were displeased with Biden. What did democrats do in response? Screamed at the minorities and preemptively blamed them for sowing division and continued pushing Biden until his debate performance made it apparent to even party diehards that Biden was not going to win. However, the party diehards still wanted to continue his policies, so they saddled Harris with the burden of continuing his garbage policies. Democrats simply did not listen to voter concerns during the election.
You're saying that Palestinians are "now" being punished, but this only shows your ignorance of over a year of intensified genocide and the decades-long campaign of ethnic cleansing Palestinians have had to endure with the support of both US parties. It's less that Palestinians are "now" being punished and more like democrats are blaming everyone but themselves like they always do, even though they had the power to make a difference. Curiously, they did not use that power. I would be interested in your explanation for why democrats chose not to.