A society which takes anything as important the life and death of Christ and turns it into a laughing matter is a profoundly babyish society. Obviously if you believe in God as absolute and undeviating then being in a perfect relationship with such a God becomes a heaven and hell matter. I respect people who hold religion in that way but it has done enormous damage and has built a lot of guilt in people. I don't believe we can know the truth of God absolutely and heresy trials simply project your own anxiety about not knowing what the right thing is to think onto others. You tend to hurt in people what you doubt in yourself.
Religion is big enough to handle differences.
Liberalism and atheism can be just as intolerant. People want an intelligent dialogue on religion not simply a set of fixed impositions. Swearing moved from using God words to sexual terms. We start to see this happen duing the sixteenth and seventeenth centirues. I think these terms came in because they shock people and continue to do so.