Generally, I agree that the terms “left” and “right” in the mainstream political vernacular are a false alternative. Both liberals and conservatives support a violent organization that usurps individual rights and autonomy by its very existence. They may do so for different reasons, but both are reactionary hypocrites or at least very confused.
I do think those terms have a legitimate use in referencing the means and the scope to which those means are used.
With that said, Darian Worden gave a great presentation (below) on why libertarianism is a left ideology. You can learn more about left-libertarianism at the Alliance of the Libertarian Left and join local ALLies in the Metroplex at the DFW Alliance of the Libertarian Left.
More of Worden’s work can be found at the Center for a Stateless Society.