It's a psychologic thing..... You have made an emotional connection with U2 and your negative experience with your wife.
Whenever U2 is on air you'll probably experience that negative feeling.
Try to let it go and try to give it a positive twist....Best of luck!!
And if it doesn't work for you, you may have to face the fact that you're simply not into U2 anymore....but hey, there's more to life than that isn't there ???