It doesn’t have to be the entire agency, that’s not how inside jobs work. Like they clearly had the worst secret service personell on the ground for Trump. It’s more so about the leaders and supervisors who were in charge of coordinating and setting up the security perimeters for that event. The secret service are experts at doing exactly that, they don’t do anything else except securing premises and escorting White House officials. For them to drop the ball like that doesn’t make any sense even if it was the c-team.
You guys aren’t familiar with how inside jobs are purported to go, those agents are simply pawns on the board for a lack of better terms. Obviously if the entire agency was involved then there would have been whistleblowers long before Trump even set foot in that town. You don’t need everyone to be in on it, the leaders who are in charge of managing the personnel and who are in charge of what to do are the ones who are suspicious af and more than likely in on it with another powerful actor.