One of the best summaries of the issue - which happens to be in an IT paper.
Its ironic that the FBI,CIA (and even NSA) have done some incredibly dodgy things in the past (some verging on evil), all proven and with very little if any attempt to even try to follow due process. Admitedly most of it was during the cold war - trying to oppose the USSR being just as dodgy all around the world in the name of global communism.
Nonetheless much of that was ordered and supported by presidents, congress, senate, the republican party etc. Its ironic that here you have a vastly reformed FBI following the prescribed process for something they and the CIA/NSA should know about. You have Trump and many of the Republicans creating fake news about it - the same Trump that demonstrably got elected on the back of fake news, and yet keeps complaining about fake news. This is all straight out of the Goebels / Hitler playbook. Its all about controlling the narrative at all costs.
The FBI will probably pay for past crimes now in the US public imagination, wounded and inefective. Just at the time their role as independant investigative body is probably more important than its ever been. We will soon see how effective the US constitution and its seperation of powers really is when faced with a president playing them all against each other.