Aquinasfan, you are a lot smarter than me. I have been reading you for a while. I am a nobody. lol But come, (smile) do you not see that he is clearly saying that aside from what you say, which is correct, that he is also saying that it is the duty of believers to proclaim that? And he qualifies believers as those 'to whichever religion they belong', as in, believers are not those believing in Christianity alone, but to WHICHEVER religion they belong. That sure says something about who he considered believers. As someone who represented Christianity to the world, that is really bizarre. btw, if BenedictXVl believes in the traditional theology, (salvation only within the RC) and JPll obviously encouraged universalism of sorts, it will sure be interesting to see how the two views are approached and reconciled in the days to come.
Anyone who follows the truth to the best of his ability is a believer, at least implicitly and to a degree, since Jesus is Truth itself.