Motte-and-bailey fallacy - Wikipedia.
You start off with the motte here:
You continue fighting outside the motte here:
Then you drop the drawbridge but do not retreat across it here, by introducing some off ramps like “in the back (or otherwise posed no threat)”:
And then you post your link without actually sounding the retreat, until I call you on it, and suddenly the motte never existed and you’re only defending the bailey.
That’s precisely the beauty of this tactic, isn’t it?