Sedition is conduct or language inciting rebellion against the authority of a state.
Sedition is the crime of creating a revolt, disturbance, or violence against lawful civil authority with the intent to cause its overthrow or destruction. Because it is limited to organizing and encouraging opposition to government rather than directly participating in its overthrow, sedition is regarded as falling one step short of the more serious crime of treason.
Every legitimate government in existence has a law against sedition. It is a basic principle of the survival of a government that it doesn't allow itself to be usurped. Those governments who did not have laws against plotting to overthrow the government do not exist any longer. They have been overthrown.
The bad news for Jihadis is that as soon as enough of us non-Muslims realize that jihad and Shari'a — in other words, primary Islamic teachings — are inherently seditious and punishable according to already-existing laws. The sooner we have that collective insight, the sooner the relentless Islamic political encroachment will be stopped.
Here's how you can help that time come sooner.
Read more: Is Shari'a Seditious?