The likelihood that JRoot interferes with any radio station whatever is slim to none. Its signal is so weak that you can barely hear the station outside of Flatbush and Boro Park.
As for geneiva, I leave that to poskim, not to posters who seem to pull halacha out of their bellies, to match their political persuasions. And I haven’t heard any poskim speak to the issue. Although the fact that several prominent poskim continue to appear on Jroot, probably should tell you something.