1. Make your own txt. file inside the "events" folder in the game files. Name it something that isn't already there.
2. This is going to be the base format on which you can mod to your hearts content:



country_event = {

id = 111111 (Must be a number that is not used by any other event, 111111 is an example)

title = (insert anything here if you want to add flavor, if not delete this line)

desc = (insert anything here if you want to add flavor, if not delete this line)

picture = (insert anything here if you want to add flavor, if not delete this line)

is_triggered_only = yes (!!!IMPORTANT!!!) (Never create any event that is not tied to something whitout this line, it will make the event trigger continuously for everyone)

option = {

any_owned = {

any_pop = {

limit = {

culture = english (insert any culture you want here from the "cultures" file from the "common" folder) (if you want to remove religious minority instead as some peoples have asked, replace it with religion = [anything from the religion file in common folder])
}

reduce_pop = 0.5 (1 represents 100%, so 0.5 will reduce the pop TO 50%, 0.2 to 20, 0 will remove it completely, any value above 1 will increase that pop, 1.5 = 50% increase of that pop, so you can use this event to boost pops as well)
}
}
}
}

You can repeat the any\_pop line as much as you want inside the event so you don't need to make an event for every ethnicity, just try to maintain the brackets "{}" so that the event works. It should look like this:

country_event = {
id = 111111


is_triggered_only = yes

option = {
any_owned = {
any_pop = {
limit = {
culture = english
}
reduce_pop = 0.5
}
any_pop = {
limit = {
culture = scotish
}
reduce_pop = 0.5
}
any_pop = {
limit = {
culture = welsh
}
reduce_pop = 0.5
}
}
}
}

That is practically all you need to do for the most bare bone genocide event, you can change and tweak everything so it suits your plan. If you have questions, or need some help, just ask in the comments. Enjoy your persecution and maybe get a therapist you bigot.