Note that there are 50 streets and squares in Turkey named after Chechen rebel leader (the so-called president) Dzhokhar Dudayev, and Turkey is a US ally. Similar places also exist in Poland, the Baltic states and in Western Ukraine.
He means Ukrainians who lived in Chechnya. Under Dudayev there was a large-scale ethnic cleansing in Chechnya where all non-Chechens were evicted or murdered. The cleansing has been supported by the West.