I can't say for sure what their intentions are or if they're even being honest, but I don't think newer generations get their politics from AM radio.

AM radio (heck, just radio) is a relic of the past and I'd say the same for Cable TV. The only reason they're still around is because older generations can't be bothered to learn new technology but, once the older generation passes, the cable companies won't have enough revenue to keep operating.

If we're talking about attacking Conservatives, I think banning a YT channel or Spotify podcast would have a bigger effect than doing away with AM radio.

Electric cars and even some hybrid models are being manufactured without AM radios due to electrical interference with the vehicles’ operating systems.

According to Axios, this interference could create “annoying buzzing noises and faded signals.”

“Let’s talk about radios for a minute,” Levin said on his radio broadcast last Friday. “Ford is the latest manufacturer that says, the future production of cars will not include the AM platform… BMW has said it. Others have said it because it interferes with something or other. They finally figured out how to attack conservative talk radio.”

https://www.mediaite.com/radio/hannity-echoes-mark-levin-raging-at-removal-of-am-radio-in-electric-vehicles-as-a-direct-hit-to-conservatives/amp/