If you are not a citizen, you are merely a guest of the country and have NO legal right to interfere with the the politics of that country, be it Thailand, Cambodia, Canada, USA, UK; etc!!
While I believe non-citizens should, within limits, be allowed to express reasoned opinions on web sites and public forums such as this, surely we shouldn’t expect to be allowed to promote or incite violent actions such as overthrowing the government?!!
Were you to allow someone into your house, would you tolerate that person’s subsequent efforts to interfere with the rules set down in your house? I think not!!! Until you become a citizen of a country, keeping your nose out of its politics is my advice!!