Many embassies are within a three mile radius. From the time of Trump’s call to storm the Capitol for his insurrection, it may have taken the slowest agent 15 minutes to get there.
But they were probably in the crowd already. Not ‘armed’ to steal state secrets - those in there likely didn’t give that a high chance of happening - but if you are in charge of foreign intel and you saw what happened in MI and you heard what the President was saying/tweeting and you were monitoring US social media networks to guage overall sentiment and you saw the stories, posts, more of pro-trump people pouring into DC for the 6th and you saw a rally being planned, by the very President challenging the legitimacy of what’s happening 1 half-mile away, to occur at the same time this President… who has already been impeached once for trying to cheat in this very election… is scheduled to officially lose his power:
If you were head of foreign intel, what would you prepare for? Well, the only way Trump can stymie this is to have the placed stormed, so why not be prepared? It’s your job.