Kowalski and the black radio presenter

The 'soul brother' character is a bit OTT, but an interesting theme in this movie is the empathy that becomes telepathy, between the radio presenter and Kowalski. It doesn't make much sense to me. The radio guy is from a completely different walk of life. He listens to gospel music and is a 'black church' type of ecstatic Christian. In the desert, Kowalski meets some white people who are playing and singing gospel music as well. The radio guy propels Kowalski along with moral support and advice about cops' traps, while the white Christian singalong in the desert benefits Kowalski by giving him some petrol and directions back on his way. When the radio fails (i.e. the black guy has been beaten and gives bad advice), the telepathic connection kicks in. Same thing happens when Kowalski turns his radio off in irritation at some advice, and the radio presenter simply 'knows' he's turned the radio off. All in all, there is a metanarrative here about black churches and gospel music. Kowalski seems to be a Polish name. Could that be the key to unlocking this relationship? Is the movie saying that the Polish man in America an underdog in the same way as the black man? I wonder about this.