I agree with you popcorn.
Very true. Kita sebagai umat Katolik perlu tahu mengenai iman kita. Kita akan seringkali ditanya tentang apa yang kita amalkan di dalam gereja.
Many of Catholic traditions and rituals began before the complement of the Bible. So, it's actually hard to find references on our tradition in the Holy Book. But if you really look into it, our Catholic tradition was actually biblical. Believe me, I didn't realize that the Sign of the Cross was actually in the Sacred Scripture until a church friend of mine talked about it. If somebody objects the Eucharist, he/she is actually neglecting God's greatest gift to them.
We Catholics are known to be calm; although we're been doctrine-attacked, we don't counter-attack. Not because we do not know, but because we know that we're following the truth. In the meantime however, I encourage everyone to read some Catholic books on Catholic teachings and traditions. It'll be handy and you'll be ready when others ask you about our faith. Di Internet pun banyak tu. Pakai ja google search..
If a protestant asks you about our faith, treat him/her gently, although he/she might argue on Catholic teachings. Don't lose you cool when you're talking to them.
Lastly, don't forget to pray for them.
Pax tecum.