I have my car radio programmed to a station that used to play contemporary Christian music. The station recently changed their format. They still play an occasional Christian song, but they mostly play contemporary secular songs. This gives the listeners an interesting variety of music. You might hear a Christian song, and then a few minutes later, listen to a song that has some suggestive or borderline offensive lyrics.
I don’t know what the radio station’s game plan is. I suppose it might be a good way to get some non-believers to hear the gospel message.
However, a Christian should not send such mixed messages. Our speech should not be Christian one moment, and something entirely different the next. We need to be consistent with our words.
“Out of the same mouth come praise and cursing. My brothers and sisters, this should not be.”—James 3:10.