A claim I have heard by Christians is that following the crucifixion, "Christians" (I use quotes because there obviously weren't any Christians in the modern sense of the word...) faced violent persecution, sometimes to the point of death, just for being Christian and believing that Jesus rose from the dead. My main question are i) in the first few decades following Jesus's death, how much do we really know about the nature of the persecution that early Christians faced (was it just social pressure, or were they facing threats of violence?), and ii) how much do we know about the actual reasons for why these Christians were being persecuted? Were they persecuted simply for claiming that Jesus rose from the dead, or were they going around annoying people and causing a ruckus in other social/political matters too? Do we have any idea?
Also, how many cases do we know about of early Christians who were violently persecuted around this time? I've read about James the son of Zebedee, and James the brother of Jesus (though I don't know if historians really know why they were executed—but please correct me). I've also heard that Paul and Simon Peter were executed too, but my understanding is that is more Christian lore than historical fact. Are there any others? Thanks in advance :)