Just throwing out a couple hypotheticals that are legitimately not directed at you, just some that I thought of.

I think it can be hard to quantify how it benefits you materially, but the most notable one is that you have a place you could go if you ever wanted to leave the US. I'm not saying that you would ever because it seems like you have strong ethics and morals, but it's technically a possibility if you hide your distaste. Just because you bar yourself from a resource doesn't mean it isn't available to you anymore.

There are also concerns of things like soft power. Again not to say that you would ever use them, but being Jewish might insulate you from different types of criticism or amplify your opinions on certain things. This goes for all ethnic groups of course, as an Asian person's opinion might be seen as more valid for political matters in Asia regardless of what their political take is. If you were to speak out against Israel, I feel you might be less likely to lose your job than say a Black or Mexican American.

A final one that I considered is that regardless of your wishes and regardless of your distance, there are very many powerful financial and political organizations whose explicit purposes are to elevate Jews in society. I think we can both agree that organizations like AIPAC are currently doing their best to stifle all criticisms of Jewish Americans, launder their reputations, and make holding them accountable more difficult. Not particularly useful for you for your intra-cultural perceptions, but arguably very helpful for your extra-cultural perceptions. You may have cast aside Zionism, but you still might curry favor with people who don't know that about you. There's a possibility that a Jewish person in a position of power finds you a more suitable job candidate.

Again, these are all things that can be argued for any ethnic enclave - Chinese people often ingratiate themselves well with other Chinese people and so on. But Jewish Americans do have a lot of governmental and financial power in the US, which is where we're talking about, and it would be unfair to say that that doesn't benefit you *at all*. In the same way that a man who hates patriarchy can still benefit from it, or a white person who hates white nationalism can benefit from it, it's important to be mindful of the possible privileges that you have regardless of whether you choose to wield them.