In order for Abigal to not be looked at to committing which craft she names someone of lower class therefor making it more believable.
Having no other choice but to admit to conjuring spirits commiting witch craft tituba goes on to say a few other names to have them out of her hair.
Resulting in all the girls that were dancing to name different each without any proof what so ever because everyone seemed to be believing that they are telling the truth. Those that were accused and couldn't prove that they weren't apart of the conspiricy were later killed "In the name of Jesus"
Joseph Mccarthy accused many people that held positions in the government to have been under the influence of communism
Mccarthy accused people without any kinds of proof and since the accusations were fake they couldn't prove themselves to be truthful.
Resulting in many being blacklisted or even losing their jobs.