Whataboutism is the standard SOP to derail conversations, esp. when related to international politics.

Other tactics include injecting hot button issues like race, gender, or TSLA into topics -- "lightning rods" -- or setting up wild strawmen to distract and create dog-pile situations.

Ideally, combine these approaches together, and have them speak from the view you want to discredit.

Multiple participants also lend legitimacy, so use long-establish sockpuppet accounts and bots to give the appearance of consensus.