And "blasphemy" can be defined as, "An irreverent or impious act, attitude, or utterance in regard to something considered inviolable or sacrosanct."
Who is to say what is blasphemy? Specific examples help to define what you mean. Without them, such a discussion is empty theorizing.
Some Christians have felt that I blasphemed for talking about the veracity of reincarnation and karma, and yet these are in the Bible in numerous places. I talk of creating miracles, and some treat this as blasphemy, feeling those miracles are the acts of the devil.
Opinions of mere mortals are rarely truth. Only with humility can we find the answers we seek. This includes humility in the face of apparently undeserved misfortune. It includes gratitude for every sword we suffer, for it is a karmic debt we pay. But payment is only complete with humility and gratitude.
Remember to turn the other cheek. It may not help them, but it most assuredly will help you. Forgiveness is not, if a grudge is still felt.