Laws against seditious speech have been upheld by the supreme court if they?
Unsure of exactly what it is that is being asked, however - -
(in the US) Sedition is defined as the stirring up of rebellion
against the government. Treason is the violation of allegiance to
one's sovereign or state, giving aid to enemies, or levying war
against one's state. Sedition is encouraging one's fellow citizens
to rebel against their state, whereas treason is actually betraying
one's country by aiding and abetting another state. Sedition laws
somewhat equate to terrorism and so-called 'public order' laws.
See below link: