(and besides, there were a good number of people with guns at the protest. And some others brought pipe bombs. Thankfully neither ended up being a factor but no one would have known that at the time)
And again: if you have the support of the police (and potentially also the armed forces) it’s all pretty moot anyway.
Or at least that's the common interpretation of QAnon ramblings.
But the point is that there wasn't any centralised leadership plotting this. There was some groups (who did have weapons) who were absolutely planning this, but the protestors in general was much more decentralized in purpose and method.
Perhaps "seal them in, turn on gas" was a figurative way of saying "trap them and kill them". Source: https://www.washingtonpost.com/local/legal-issues/conspiracy...
FBI charging documents do make references to the telecommunications of the OK defendants, where they are trying to trap and gas congress people under the capitol.
Neither the FBI nor Capitol Police has made claim that any lethal gas was present, period. Not in possession of "Oath Keepers" or otherwise. Not in "underground tunnels" or anywhere else.
No reputable news agency seems to be claiming thus, either.
So, the burden is on the claimant to show that this isn't pure narrative fantasy.