Most people look at refugees from a particular country who don't (or won't) assimilate and say “Let's try refugees from a different country instead.” The Modern Left looks at the same situation and says “No, let's get more refugees from the same country”.
This anti-common sense reaction arises from the core belief of the Modern Left: Discrimination is the only real evil. To discriminate is wrong. In fact discrimination is the only real wrong, and it is the ultimate cause of all other wrongs.
Where did this idea come from? From the following notion of the history of humanity.
Throughout history, cultures have established their own religions and practices, and each culture in turn has believed their own religion and practices to be true and right. This 'bigotry of belief' is the cause of conflict with other cultures of different religions and practises, resulting in the wars and injustices that have always been evident in history, up to and including the present.
It is therefore the attempt by people to be right, to find 'the true way', which is the cause of conflict with others, and hence it is this attempt to be right which is the cause of humanity's problems.
The solution presents itself: Stop attempting to be right; stop striving after the true; recognize that all supposed knowledge of good and evil is little more than bigotry imposed by variable cultural factors. Instead, says the Modern Left, imagine that no one believed they were right and others wrong; that no one believed that they alone held the truth and that others were mistaken. There would be no need for conflict. There would be no need for war. No need for injustice. In short, imagine nothing to fight and die for, and no religion, too. It's easy if you try.
All that is required is that we eschew the singular evil that is 'discrimination'.
It is this innocent starting point which inevitably leads the left to side with evil, failed and wrong against good, successful and right. The logic is simple and inexorable.
Given that we cannot/must not discriminate – categorizing some (people, cultures, behaviours) as evil or wrong, and others as good or right – how do we then explain the success of some people/cultures/behaviours and the failure of others?
Given the premise of non-discrimination – there is no 'right' and no 'wrong' – there can only be one explanation: Somehow, the successful ones cheated. Maybe the successful ones stole from the unsuccessful ones; for example, they stole their oil, or their land? The big successful countries became big and successful by stealing from the poor and the unsuccessful. It is the only explanation consistent with the basic premise of non-discrimination.
So, the unsuccessful cultures are the victims of the successful cultures. Therefore, any evil done by these unsuccessful cultures is proof, not that they are evil, but that they are victimized. And the greater the evil they do, the greater must be their victimization. How victimized must the people in the Gaza strip be, that they celebrate in the streets over the deliberate mass murder of Israeli school children?
Thus do the Modern Left maintain the following world view: (1) We are virtuous because we don't discriminate, and because we side with the victims of discrimination, and (2) conservatives are evil because they engage in the only true evil (discrimination) and side with the victimizers.
To help promote this world view it is useful to muddy the distinction between the successful and the unsuccessful; to lift up and promote the unsuccessful, and to tear down and degrade the successful. They need to show that the results of discriminating thought, of the striving to be right, though they may appear to be good and successful (America) are actually failed and bad (Ameri-kkk-a). They need to show that unsuccessful groups are not unsuccessful because they adopt inappropriate behaviours, but because they are the victims of discrimination. The left use the schools, the movies, the courts, the media to push this line at every opportunity: (1) discriminating thought used to strive after the right and true fails, and (2) the refusal to discriminate, the refusal to judge some good and others bad, succeeds. Lift up the evil, failed and wrong and tear down the good, successful and right until it is all a wash; until there is no 'good' and no 'bad'; until there is nothing to discriminate between.
This is the core belief (non-discrimination) and the ultimate motivation (prove it works) behind all leftist policy (note: not all policy by leftists). And it is why leftist policy is always wrong. Not usually wrong but sometimes right, like a stopped clock. Always wrong. It is designed to be wrong. It is designed to promote the wrong and to degrade the right; to prove to you that discrimination is the ultimate evil and that non-discrimination is the solution.
It is why we must not replace the quota of Muslim refugees from Somalia with refugee Karin people from Burma. It is why we must instead increase the quota of those who won't assimilate at the expense of those who will. Never mind reality, non-discrimination works, dammit!
* This is my paraphrase/adaption of Evan Sayet's talk at the Heritage Foundation, which can be viewed on youTube here. Sayet has had plenty of opportunity to study the leftist mind; as a Hollywood screenwriter and as a Jew growing up in New York he has been surrounded by leftists his whole life – and he was a Democrat until two days after 9/11, when he saw his leftist friends' reactions to the attack. Starting at that time he began a quest to understand the leftist mind; what caused them to react that way?