According to Mein Kampf, what were Hitler's views on "undesirables"?

In the world the Nazis wished to create, Jews and Gypsies were to be eliminated as racially, socially, and physically defective. The deaf, the blind, the physically disabled, homosexuals, the mentally ill, and alcoholics were either to be sterilized or killed simply because they were viewed as "genetically defective." Slavic people, though labeled racially inferior by the Germans, would be allowed to exist as slaves in order to supply the Nazis with free labor. Criminals, political enemies of the state, and homosexuals were pronounced socially undesirable and subject to the will of the Nazis.