The Guardian article gets the record wrong right off the bat, and it just goes downhill from there into really outlandish sensationalism.
NO, the Supreme Court didn't rule that presidents are above the law. The ruling said the exact opposite, refusing to grant Trump his claim of unlimited exemption and instead buttressing the system through which he may be prosecuted.
So no, ACB didn't join the majority in creating a constitutional crisis. It takes similar misinformation about the Court to promote that sort of claim about what's going on here.