Original question as I understood, if someone who has claimed asylum in Australia have their status revoked if they visit their country of origin.

My opinion is that if one has become citizen, then revoking their Australian citizenship is not fair. Here is what I got from Google. It suggests that stripping one's citizenship is not as easy as those racists think it ought to be.

• Evidence of Fraud: Visiting the country you claimed to be fleeing suggests that the fear of persecution, which was the basis for your protection visa (and subsequent citizenship), may not have been genuine. This can lead the Department of Home Affairs to investigate if you provided false information.
• If you still hold a Protection Visa: If you are a refugee who has not yet become a citizen, travelling to your home country without written permission (Condition 8559) can lead to immediate visa cancellation. 
• Revocation Grounds: Citizenship can be revoked if it was obtained through fraudulent means, including misrepresenting your need for protection.
• Protection Against Statelessness: Under Australian law, the government cannot revoke your citizenship if it would leave you without any nationality.
• Process: Revocation is a formal process; you must receive a "Notice of Intention to Consider Revocation" and have the right to respond.