Destructionism
A sort of political mentality,that has a person institute ideals that they know sub-consciously are destructive but believe in them anyways.
Liberalism is Destructionism in another name.
Destructioneer
A destructioneer is a person who specializes in destruction. He/she will often be hired to do a person's dirty work, often being supplied by themselves but very rarely by other people.
My neighbor happens to be a destructioneer.