Just occurred to me, all the hullabaloo is over the lyrics "At break of day when that man drove away, I was waiting. "I cross the street to her house and she opened the door. "She stood there laughing... I felt the knife in my hand and she laughed no more."
At no point does it mention violent behaviour, it may just have been she was a knife stickler and the knife in question was uneven or of poor metal quality, after all South Wales has the steel factories, she may have been a quality controller of steel and was unimpressed. So unimpressed she called the fuzz who then attempted to arrest the man on poor knife maintenance charges....