Then why did they not target Mozilla, or Netscape? They (for whatever reason) picked out Opera.. If you can not see this is a totally unethical (and by the way they have been found guilty of using illegal tactics to push their software in the past) and probably illegal attach on a competitor.
If you cant see this was unethical then I am sorry for you and perhaps I am not the one letting my 'loyalty' to a certain set of software cloud my judgment.