I’ve found the best way to shut down their bad faith genocide denial bad faith arguments is to flip it on them. Accuse them of being genocide deniers themselves by enabling a group that openly advocates for exterminating the LGBTQ* community, mixed race couples and leftists. Also, there are some really incisive articles about the Falung Gong by western media sources, use those instead of Grayzone and I’ve found Reddit libs conceding over it.