Wow, you're like some kind of cultist. Any criticism that might apply to democrats and you come out swinging.
My premise is that we don't know what ethics violations have been suppressed by either party. We know that both Republicans and Democrats have been found to have violated ethics, but we don't know whether it's the majority that have been exposed or if it's just the tip of the iceberg. If it turns out that the Democrats have never suppressed an ethics violation then maybe they do live up to your mental image of them and are pure as the driven snow. But, it's also possible that the democrats have protected some members.
That doesn't mean that Republicans are better than Democrats or something, it just means that politics is politics and sometimes people in power get away with things. But really dude, you should cut back on the hero worship. These are just politicians, they shouldn't be your whole identity.