How is this burning everything down? Just like its within the rights of Republicans to nominate and confirm a supreme court judge now, and just like it was within the rights of republicans to block Obama's nomination, if the Dems win back the senate and the presidency, it will be within their rights to expand the court. The Supreme Court hasn't always consisted of 9 members. The size has changed in the past. If republicans refuse to follow norms, why should democrats?
Republicans are deciding to act against the new norms they established just four years ago, a decision that is highly unfavorable amongst voters. They will pay the political bill for that decision, whatever it ends up being. It may be giving democrats enough political capital to expand the supreme court.
I'm not sure what to say to the rest of your post, just sounds like you're channeling your inner Trump.