Wrong. Genocide was never really practiced even by the worst Cecil Rhodes type; it was in some German colonies though. Germany was also imperialist within Europe; the treaty of Brest-Liovsk is a good example...
And however bad the adminstration of India was (and it was dire) it was actually one of the *better* run colonial posessions (as hard as that might be to believe) at the time... much better than (say) the Dutch East Indies or French West Africa.
What German colonies? I don't know much about German colonialism.
Africa:German Kamerun
German East Africa (now Burundi, Rwanda, and Tanzania)
German South-West Africa (now Namibia)
German Togoland
Asia and the Pacific:German Samoa (assigned to New Zealand after war)
New Guinea and Nauru (assigned to Australia)
Various German islands in the Pacific north of the equator (which were assigned to Japan)
--Mainly the modern countries of Palau, Micronesia, Marshall
Islands, and the Northern Marianas.
Also, the German coastal possessions and sphere of influence in China were ceded to Japan.