I don't think all ethnicities have been targeted for pursuing money the way Jews have in the past, or still are.
I also don't think because someone says someone else is "all about the Benjamins" and the person is Jewish means that they're leveraging that trope - they could be saying that the group/person that happens to be Jewish is pursuing money which is inherent in most (I did say all before) ethnicities and is a fundamental part of the capitalist system in which we all live.
It also could be the case that Omar's antisemitic AF. Deeper analysis of other quotes could definitely show evidence of that.
It's my contention that if one accuses her or anyone of antisemitism, the burden of proof is on the accuser to provide evidence and in this particular situation with this particular statement, IMO there's plenty of reasonable doubt. This is no different of a standard than we apply to accusations in this forum, and have explicitly stated it several times.
Furthermore, in terms of evaluating efficacy of evidence supporting accusations, I don't find "it's not apparent to you" to be particularly convincing, which is why in legal areas we have the reasonable person standard.
Maybe others do not want to apply the high legal-esque standard in this situation that I have here but to each their own. They run the risk of falsely accusing someone of antisemitism. The other side of the coin is that my standard could result in not recognizing antisemitism but I am willing to give the benefit of the doubt, metaphorically innocent until proven guilty per se.