Assume that this is an apocalyptic Jew before rabbinic judaeism. That should frame thinks a bit better. The problem, at least as I understand it, is people doing commerce, particularly for a profit, in a sacred space. I do t think the money was the problem in and of itself, but rather the execution and motive. In another story, biblical Jesus tells someone of wealth and power that what he needs to do is give all of that up and he was quite miffed (in a very tldr telling)