Nope, what I showed is that Gunn bracketed the two ideas-- America was founded by immigrants, and America once possessed the virtue of kindness-- as if there was a necessary connection between the two. Just the basic correlation by itself breaks down as soon as anyone asks, "What about how kind those immigrants were to Native Americans?" That's a frequent Mad Lib talking point, and the reason I believe Gunn chose to play down the usual "evil colonists" narrative was that he wanted to suggest that in contemporary times we ought to be "kind" to all immigrants, even illegal ones, because that too is a well documented talking point of the Left. Gunn's experiences with Leftie cancellation probably made him too smart to go Full Metal Mad Lib while advertising his movie, but he followed up his confused remarks by acting like the Right has somehow come out against kindness, just like the OP here.
“‘Superman’ is the story of America… An immigrant that came from other places and populated the country,” James Gunn stated.
nypost.com
I give him credit for doing a much better job than anyone on this thread of muddying the issues. He managed to throw in little bits of Leftie sentiment but wasn't as in-your-face as a lot of MCU crap, so he's reaped (so far) a pretty decent box office.