However, the "border blaster" stations in Mexico would sign off precisely on schedule, playing the Mexican National Anthem [audio] with men's chorus and brass band.
The radio stations were required to broadcast "The Mexican National Hour" in the Spanish language, which turned Sunday evenings into a series of special-programming blocks.
I don't see a problem with it.
I do, however, have a serious problem with the government /potentially/ forcing nationalistic and god-fearing content (e.g., the altered Pledge) on the country’s inhabitants who choose to listen to broadcast networks. These are supposedly voluntary; and, if so, cool. But; if they later use it against a network, then it’s a big issue.
Freedom of speech and expression is an inherent right of the US under its Constitution; government-forced nationalism and religious ideology is not in the public interest, regardless of which political party is in power.