Perhaps the most meaningful thing the '40s Superman radio series did, mainly in 1946-7, was to embrace the fight against racial and religious bigotry and anti-immigrant sentiment as their main ongoing theme. For those two years, quite a few of Superman's foes were demagogues exploiting xenophobia, racial and religious intolerance, and fear of immigrants in order to play on the public's fears and manipulate them into giving them power. It made no bones about comparing such people to the Nazis and exposing them as hypocrites and frauds. The most famous storyline was one written by a journalist as an expose of the Ku Klux Klan, using a fictionalized KKK-like group and revealing their leaders' hypocrisy and petty profiteering, and which actually did a lot to demystify and humiliate the KKK. Today I see politicians like Trump (but hardly limited to him) who are effectively indistinguishable from those villains in a 1940s kids' show, and I realize how important Superman's message really was. I'd love to see Supergirl take that same kind of moral stand. They're sort of dancing around it with the bit about Max Lord stirring up anti-Kryptonian sentiment, but I'd love to see them have the guts to have Supergirl take on racial/religious bigotry and fearmongering demagogues more overtly.