Do you see him? Do you see what he is doing? He is working. To help the Daleks. To help them become something more. To free them.
Instead of, you know, leaving them behind to burn and coercing them into killing themselves even though they are literally harmless and asylum patients
That happens in Journey’s End – the (real) Doctor leaves ‘mad’ Caan, who was working against the rest of the Daleks, to burn along with the rest-
-and attempts to save Davros.