Democrats have been trying to set up for ethnic cleansing since Hillary ran, and all this is is another blame the Republicans for what Democrats are doing psycho projection.
You certainly know enough about them by now to see that or at least suspect it.
As Peter mentioned, the guy's making a categorical error. Wanting to be selective about immigration and wanting to avoid being overrun demographically aren't the same as ethnic cleansing.
Specifically, how would you say Republicans have been supporting ethnic cleansing? There are certainly extremists out there that support it, but I don't know of any officeholders that support it.