You can’t commit genocide until you “de-humanize” the group you want to kill.
You easiest way to dehumanize them is to make them seem like the biggest threat to life, liberty, and any sort of happiness. You need to indoctrinate them young, and keep the fear pressure on as much as you can.
Then…you need to double down. You need to make the point, over, and over that there is absolutely NO WAY TO REDEEM the group you want to eliminate. You need to make the argument that there is simply no peaceful solution.
Use whatever media outlet you have to reinforce the message that this group is evil, and completely worthless: http://www.dailywire.com/news/14579/feminist-writer-white-people-are-evil-amanda-prestigiacomo#
Repeat this over and over, and when called on it just say “we want to start a dialogue, and we aren’t racist because racism can only come from a place of power.” As if the pages of a magazine, or editorials in a newspaper, were not occupying their own place of power. Rely on the reader to believe that the dehumanization is really a good faith act rather than a deliberate attempt to dehumanize a target population for extermination.
And someone will pick up on it: https://www.washingtonpost.com/news/morning-mix/wp/2017/09/01/kill-all-white-people-did-a-suspected-kansas-city-killer-target-middle-aged-white-men/?utm_term=.c0cc39f5ea66
Right now the only things stopping genocide against white Americans is that white Americans are still a majority, and still have a viable means of self defense. All the other pieces of the puzzle have fallen into place.
How’s that for a conversation starter?