Why is religion a flashy issue?

Tweet

Of all the differences human race got in this world, religion is one of the most flashy and intricate to handle. In our history, there are more bloodshed made in the name of religion than other causes. That's how powerful religion is. There had been unsucceesful attempts to thrashed out religion but to no avail. Faith or beliefs just formed a very important core part of our lives. Religion is a very subjective matter. It could even border into irrationality and fanaticism. Why do you religion is a very hot topic/issue to tackle upon?