That is the problem with prolific, pathological, born LIARS!

Reasonable people catch the errors and begin to doubt the story. However, those invested in believing liars for any number of personal reasons find excuses and justification for any gaps in reason or timelines. If heavily invested, they may assign a liar's stumbling gibberish, stammering excuses, or trying to "fix obvious errors" down to understandable mistakes or them being nervous & feeling attacked. Therefore they may readily believe a liars claims of conspiracy against them or the accuser being jealous or even to be a liar themselves. So they jump aboard the denial train and invest more into it moving forward, increasing their need to protect their belief in the lies.

The greater the investment anyone has with the liar (love relationships, political beliefs, defiant public acceptance that triggers their own fears of rejection or embarrassment, etc) the greater the willingness to overlook the obvious clues that someone is actually a bald-faced liar.

If the liar resorts to attacking the accusers as being deceptive, unfair, jealous, politically motivated, stupid, ignorant, or flat out wrong, it gives the believer the opportunity to replace potential suspicion, uncertainty, or a nagging feeling of doubt with anger at the attacker rather than at the liar. Especially if the liar is able to bring the believer into an "us vs them" mentality.

They begin separating individual lies from one another to avoid having to defend the liar's too often nonsensical or diametrically opposed claims and abandon critical thinking so they don't have to recognize their own unconscious, nagging doubts and fears. Those doubts are replaced with a fight or flight response where they actively attack those who point out the lies or they put their fingers in their ears refusing to hear the evidence against the liar.

Eventually, all but the dumbest or most devoted believers can no longer deny what they see or hear with their own eyes & ears. When that happens they either withdraw, becoming significantly jaded OR they go on the offensive, viciously attacking the one(s) who'velied to and tricked them into believing bullsh!t.

We'veall seen the polls showing significant disbelief amongst former believers. It is only going to grow.