I am not anti-OT. I love the Old Testament. It's Scripture. But the law of Israel is given to Israel, not to the nations. I read it as a Christian because that's how the New Testament instructs me to read it. If you're not familiar with Christian habits of reading the Old Testament, I am more than happy to recommend some good resources (beginning with Origen).

There's a whole host of things given in Torah that you do not follow. Have you not read Calvin on this? It's very strange to call yourself a Calvinist and then advance the idea that these teachings are somehow normative over and against the Dominical instructions, which everywhere tell us that violence against another is not allowed for the Christian. It is, again, why I suspect you've yet to quote Jesus on the matter.