If the US will send 20 000 peacekeepers to the East of Ukraine this will surely worsen the situation. The US will not follow international law and this will surely result in genocide of the local population.
No evidence given. If a peacekeeping mission would be deployed in the East of Ukraine it would consist of an international contingent under UN mandate. There are no indications that such a mission would result in a genocide. https://www.rferl.org/a/canada-making-diplomatic-push-ukraine-un-peacekeeping-plan/28845877.html, https://www.wsj.com/articles/u-s-to-seek-russian-approval-for-peacekeepers-in-eastern-ukraine-1510258304. The term genocide is regularly used in pro-Kremlin disinformation to inspire fear, without having any connection with the actual act of genocide https://euvsdisinfo.eu/disinformation-cases/?text=genocide&disinfo_issue=&date=.