Regarding your first question of building the mosque, charity of a non muslim to build a mosque because it is prohibited to use the money earned by evil way to build a mosque and this rule applies to a muslim too.
Regarding your second question, When you mean a sacred shrine impure things are allowed in such shrines, weapon is not a impure thing, even Hindus do 'aayudha puja' in south.Sikhs who visit their shrine carry swords with them, sword is a weapon.Then what is wrong in having a A K 47 in a mosque. You have to considere it bad only when it is used for a bad purpose.
Regarding hypocricy! What muslims did (taaliban of Afganisthan and Lal Masjid) in not at all wrong according to their religion! Reason: Allah command muslims in Quran to establish Allah's Law on the earth and muslims of Afganistan and students of Lal Masjid are struggling for it. Yes, I agree with you if you talk about Indian muslims as hypocrites because most of them had forgot their real aim of their creation.
Main isiliye mussalman, main isiliye namazi, mere zindagi ka maqsad Tere (Allah) deen ki Sarfarazi.
