“The burden of our accusation against them is that they come in conflict with our labor interests; that they can never assimilate with us; that they are perpetual, unchanging, and unchangeable alien element that can never become homogeneous; that their civilization is demoralizing and degrading to our people; that they degrade and dishonor labor; that they can never become citizens; and that an alien, degraded labor class, without desire of citizenship, without education, and without interest in the country it inhabits, is an element both demoralizing and dangerous to the community within which it exists.”