In Amerikkka, politics is about winning. Idealists of both the left and right seldom grok this plain fact. You have no shot at implementing progressive policies unless you win. Worse, if you loose the other side has a shot at implementing more of the same Reaganomics that has helped destroy this country (along with Clintonomics) since 1981.
Sometimes the smart thing to do politically is try to relate with the "other" whom you need to attract into your voting bloc, walk a mile in their shoes and empathise with their problems rather than obsess solely on yourslef. I know, I know.
You can always go back to hating on them post-election.
White progressives seldom grok that for immigrants elections have practical implications. When Trump goes on and on buffoonically about Mexicans and the border he is indirectly threatening Asians too, many of whom are also here illegally and worse off than Mexicans if deported, because they will be treated as criminals when they return to their home countries under those circumstances.
Now, Trump is not an idiot (although he plays one on TV). He knows that the US of A-Holes benefits greatly from illegal immigration, on the high end by Asians and on the low end by Hispanics. These people bring youthful vitality, desire and social security/medicare tax dollars to the table.
There are ample reasons minourities will prefer to vote for the candidate they see as the one with the best chance of keeping the GOP out of the white house. regardless of how liberal or cool that person is to white progressives, who face no such daily obstacles in our uber comfortable progressive existences.
Well-educated whites have all the relative advantages and seldom consider that minourities, even better educated and wealthier Asians for instance, have more reason to fear the Amerikkkan electoral outcome and will vote defensively moreso than anything. And this has nothing to do with whether they personally like one candidate over another.
At the end of the day, Bernie must assure minourity voters that he can win the general election.
Progressivism is a luxury for many minourity voters not a necessity.
This seems counter intuitive to most whites. However, most whites spend very little to no time, especially intimate time (full disclosure: donkeytale is married to an Asian immigrant and spends most of his personal and professional time in the minourity community), getting to know and truly understand what motivates minourity voters.
Up there in lily-white, hippiefied Vermont Bernie can certainly be classified as "most whites." He stumbled out of the gate with minourities and has been playing catch up since day one. And even here, one gets the feeling he is doing so against his (extremely Caucasian and erroneous) belief that economic inequality rather than racism is the number one problem affecting minourities in the US.
He is smarter than most whites and has made adjustments but he still needs to gain more ground. It seems he is doing better relatively in attracting latinos rather than Africkkkan Amerikkkans, but the latino demographic is notoriously difficult for pollsters to pin down as "likely voters."
Just win baby.
Asians score higher than whites on education levels, SAT scores, hard work, entrepreneurialism and income and are the fastest growing immigrant population. They would seem to be GOP leaning based on these characteristics .