Everything old is stupid! The world is full of 'chronic necrophilia'! We're going to remake everything!
Yes well. This is the type of thing that gets written occasionally, I guess, and so from 1909 to 1916 a group of Italians was shouting in print about how they were going to bring into the world a new beauty, the beauty of speed, and how they were going to celebrate violence and masculinity and joy. Modernist stuff. Sure.
The realm where they seem to have really formed the tracks for mainstream life is architecture. But they had a big impact in a lot of other ways too. They apparently taught Pound his more extreme polemic style, so BLAST is their creation, and words-in-freedom and destruction-of-syntax, their creeds, are alternate ways of talking about how modern poetry works. Also, in the realm of music, the Art of Noise, that is, incorporating non-musical sounds into music, is a big thing. I wonder what old Marinetti would have thought of Pink Floyd's "Any Color You Like."