And for argument sake. The catholic is wrong in this instance because, Its ok if you want to believe in any religion but to interfere in others belief by using their terms or special names - you are trying to be a cheeky bastard. Which wat nmost catholics are from my experience. worst hypocritical idol worshippers.
I see you're ignorant in 3 areas:
1. What's happening in M'sia regarding this issue
2. The history of the word Allah
3. The Catholic faith
Do read:
1. http://www.themalaysianinsider.com/index.php/opinion/k-anand/50053-a-letter-to-a-muslim-friend
2. http://theamericanmuslim.org/tam.ph...alaysian_muslims_understand_what_allah_means/
3. You may like to read up more from the appropriate sources or speak to a catholic priest about the religion instead of being mislead by evangelical religious groups. I do not know in what context your "idol worshippers" fall under but if it's to do with saints interceding prayers, you may want to read http://www.catholic.com/library/Praying_to_the_Saints.asp In any case, there are lots of explanation to your queries and it would be wise to pick catholic websites to avoid further misunderstanding.
You may also like to know that apart from the catholics, the christians & sikhs in m'sia use the term Allah too. Are they cheeky bastards too?