Christian radio stations have to turn over an hour of programming time to non-Christian issues sometimes up to an hour a day depending on their broadcast format. Music requires only a half hour a week of counter broadcasting but a talk format would require over an hour a day:

When is a Christian radio station not a Christian radio station? For the hour or so a day that it must air the views of other faiths to satisfy the CRTC’s “balance” policy.
“It’s ridiculous,” says Bob Du Broy, vice-president of Ottawa’s CHRI Christian music station. “It’s like asking a rock station to play an hour of classical music.” CHRI’s announcers also find themselves in the bizarre situation of working for a Christian station without being able to talk much about Christianity for fear of triggering the “balance” issue.
Because CHRI 99.1 FM plays mostly music, its requirements for offsetting Christian proselytizing have been minimal at just over 30 minutes a week.
[…]
Religious music needn’t be offset with other faiths, but the broadcast regulator, the Canadian Radio-television and Telecommunications Commission, does require that spoken-word programming offer differing views. However, it is up to the applicant to propose just how this would be done.
Denis Carmel, the CRTC’s director of public relations, said “It’s unlikely that a single-faith station could be balanced (without some programming on other faiths).” Is it possible to get a licence without outside faith programming? “I’m not going to respond to that.” Mr. Du Broy figures the CRTC will want at least one hour and 11 minutes a day devoted to other faiths. To get that figure, he multiplied 67 per cent (the amount of talking on air) by 7.35 per cent (number of non-Christians in the Ottawa area) to come up with 4.9 per cent of the 24-hour broadcast day, or 71 minutes.

This is why we fear the fairness doctrine. Why should Christians broadcast about other religions? Our job isn’t to promote false religions, it’s to promote Christianity. I wouldn’t mind learning about Buddhism or Islam but why does the Christian station have to promote those religions and hire someone to do it? It’s not their job.