Q 2: Sometimes
I write to Christian organizations
and other countries, and they send me some of their publications with a few questions about them. So just for fun or to get information, I send them my answers to their questions. Is this permissible?
If you are ordering their publications and answering their questions, as you say, for fun, this is not permissible. However, if your intention is to refute them, show up their shortcomings, expose the reality, and explain the truth, there is no harm in doing this.May Allah grant us success. May peace and blessings be upon our Prophet
Muhammad, his family, and Companions!