We got anti-discrimination legislation in the USA preceeding that which reference, and yet...black people in the USA are thrown in prison at an extraordinary rate. So all that legislation sounds fine in theory...but how does it work in practice?
The USA calls itself "...the Land of the Free"...and yet has more imprisoned than Russia and China combined. And if you consider that the combined population of China and Russia 4x+ greater than the USA, then it is staggering the rate with which the USA imprisons people. Hey...people say one thing, and do another. That's life.
There is a very real problem that governments may be a able to legislate about what people do but not how they think. Merely legislating for equality does not remove bigotry, discrimination and prejudice. What often fails is the follow through of affirmative action. Legislation can be well meaning but ultimately ineffective.
There may be sex discrimination legislation but women still have difficulties with rights over their own bodies in Ireland North and South.
Trump is a good example of how religious bias persists, but at least pending a decision from the supreme court it does appears that the US courts are restricting his application of his bias.