After Christ removes the church, He will establish the time of Jacob’s trouble. After this, Christ will return as a thief in the night to make up His jewels.
John wondered at the thought that there would be a time in the future when a group identifying as Christian would put others to death for having faith in Christ.
A martyr is one who is killed for his faith. Only two individuals are specifically named as martyrs in scripture: Stephen and Antipas.
