Part of the problem is that many hard core leftists are now the ones conducting the security investigations with an accusatorial eye upon those who seek to defend the Constitution from all enemies, foreign or domestic.
They’ll ignore evidence of loyalty and faithfulness, while they cast aspersions against the most patriotic citizens. In contrary, they will gloatingly approve the most arrogant picayunish frauds, if they follow their political bent.
I might even be too gracious in my assessment. They simply might be demonically possessed seeking to devour any who are faithful.
Actually, I'm a bit more optimistic on this.
The adjudication guidelines previously were such that one would have to actually participate in these activities (BLM, Antifa, etc). They have very recently changed to allow sympathy to be considered.
That is YUGE.
I don't minimize what you're saying but those adjudicators and investigators who are actually loyal did not have the tools to rule out these traitors. Now they do.
Not saying it's going to be overnight, but over 5-10 years, there can be a significant change.