How Does Quentin Tarantino ensure the audience know the film genre before watching?

Quentin Tarantino is a multi-award winning director and actor. his films do not dissapoint in award season however are always on contraversial topics. for example 'Inglorious'. inglorious focuses on a very sensitive subject such as the holocaust. by choosing not to satirize but explore different viewpoints of human genocide such as the horror of Nazi Germany we know as the audience that the film is going to have conflict, action, death, and mystery all main conventions of the thriller film genre. All directors have their own styles of doing things. For example Alfred Hitchcock and Stanley Kubrick seemingly specialized in thriller films with important elements of horror. e.g 'PSYCHO' and 'The Shining'. another example is Ben Wheatley and his gritty, harsh films such as 'A Field In England' which are just simply difficult to watch. This therefore differentiates with Tarantino's methods whose sensitive subjects ensure thriller spectacles as the audience know what to expect and look forward to the conventions of which Tarantino specializes in and how he makes films on devastating disasters without causing offence, that is why his films are so highly rated and wipe the floor over the award season. Another example of Tarantino's sensitive subject choice would be the Slave Trade in the USA. by using famous actors i,e Leo Di Caprio and Sam Jackson a wider audience is targeted and appealed to whilst still drawing in regular audiences from fans of past films. Tarantino tends to have a large scale Hollywood actor to play the main protagonist who change in different films however he sticks with not only the award winning actors, but actors who have helped define the films he creates. for example Brad Pitt played Lieutenant Delrein in 'Inglorious' and Christophe Waltz played the Nazi Officer and likewise Leo DiCaprio played Candy in 'Django Unchained' and Waltz starred as the main supporting actor.