Well I kind of agree, as I've written elsewhere democrat and republican administrations largely follow the same pattern. They both unhesitatingly support apartheid Israel, they both advocate military intervention to achieve regime change, they both oppose democracy in Latin America and so on.
But X said that in 1963, some 63 years ago, the term "liberal" today means something different to what it did in 1963.
America is a society based in white supremacy and colonialism, the illusion that there are two ideologically opposed forces is just that, a facade.