The money's pretty neutral but brokers like GoFundMe aren't and IMO shouldn't be compelled to be.

I agree with that, except in cases where the number of brokers is small and monopolistic. That's not strictly true for platforms like gofundme, but it is true for payment processors, who are the real choke points in the ecosystem.

My issue with Gofundme isn't that they aren't politically neutral, it's that they took the money first, and then just decided to hold it hostage. Had they not accepted the trucker's money, or just refunded all the donors, or disbursed the funds to the org and then refused to accept anymore, any of those things would have been fine. But what they are doing here is tantamount to theft, and that I do believe brokers should be compelled not to do.

They are compelled not to discriminate against protected classes.

I mean, we do? Dollar bills are politically neutral.

This rules out Bitcoin.