First off, they dont work in call centers or have fancy calling systems, most just have a TextNow and wont pick up once you call as they either; are logged into another account, on call with another person (victim or baiter), not at their phone, busy or something else. With Lottery Scammers / PCH impersonators you need to leave voicemails and hope they get back to you.
Onto religion part:
How do you know they are Jehovah Witness?
They are typically from Jamaica.
https://www.jw.org/en/jehovahs-witnesses/worldwide/JA/, theirs not a whole lot of them in Jamaica.
Only 1.9% are Jehovah Witness. The majority are protestantism.
From basic googling I have figured out Jehovah Witness and Amish are two different religions.
I don’t understand why you felt the need to generalise the scammer religion and bring it up just to refer to them in a negative light. While I am not bothered by people bringing religion up in baits and I feel scammers should be painted in a negative light, in a public setting you don’t need to generalise the scammers religion especially in a setting where it could paint the religion in a negative light or the people apart of it. While I am not religious, other people could be offended by it so I felt like bringing it up.