Would you have the same belief if you were born in China? Or perhaps in an African tribe?
Be honest now.
Assuming your answer is "no", then how come you were so lucky to have been born in a place where the "truth" was taught, while those other people are wrong?
I am very fortunate to live in a country where Christianity is allowed. You are correct. And sure, people in China or Africa (althougth there are now a good portion of Christians in these areas) may have a different belief than me, but that does not make their opinion valid.
I believe every word that Christ said. So yes, it is my opinion, but...