How do you know covid kills people on the spot in China?
How do you know if you got sick that you had Covid?
The Witnesses in the bible (Rev 11:3-12) are clothed in sackcloth, which represents repentance. They have the power to strike the earth with every plague as often as they want.
Sometimes you can't just tell the people, you have to show them.
It's easier to fool people than to convince them that they have been fooled.
You're being shown. Enjoy the show.