I don’t have a problem with this shulchan aruch, rather you claimed it is a problem. I don’t understand the problem you claim to see, nor do you, apparently.
Beyond that, this was not even a conversation about the shalosh shevuas, it was a conversation about the chofetz chaim’s sefer lekutei torah that bothered you.
I’ll quote it here:
The Torah teaches us here not to stand up against the nations even when they confront us. We are obliged to follow in the footsteps of our father Yaakov during his war with Esav his brother. As the Ramban explains in Vayishlach: “This [episode] contains a message for the future generations, for all that has happened to our father Yaakov with Esav his brother will happen constantly to us with the children of Esav. And so we should follow in the way of the righteous one [Yaakov], and prepare ourselves for the three options for which Yaakov prepared himself then: for prayer; for giving gifts; and for salvation by way of war, meaning, by fleeing and thereby being saved. And behold — whenever we have followed this tried and true strategy, Hashem has saved us from our enemies.
— Translation from “Shapiro, Rabbi Yaakov. The Empty Wagon: Zionism’s Journey from Identity Crisis to Identity Theft.”
So your question is simply how the chofetz chaim understood the SA you mentioned.
I am now further confused by your ramblings now about how to be kofer in the shalosh shevios, something this SA has nothing to do with.