I congratulate you for making an effort to write about Mosque and muslims.
The correct word is Masjid, derived from arabic word "Sajada" which means to prostrate oneself (in worship) and Masajid means the place where Sajada is made. For muslims whole world is the place where U can prostrate. Only requirement is it should be Clean and free of impurities.
Secondly, Idol means an image used as an object of worhip. We do not have any image in any of the Masjid.
"Ek Tu Hi Nirankar"
We muslims do not have a practice of idol worship.
As far as I know, origin of Islam is right from the origin of human kind, i.e. From Adam (peace be upon him). Allah has send messengers from time to time to remind us about worshipping one God (Allah) as he is the one worthy of worhip and refrain from worhipping false Gods. Muhammad (peace be upon him) is the last and final messenger of Allah.
If we want to know Islam, we have to see his Muhammad's (PBUH)life and how he had practice the commands of Allah.
If our objective is to acquire the correct knowledge of any topic, we should not approach with a pre-dermined mindset. It will only take us in wrong direction and not to the truth.
If U want to know Islam, approach a scholar, it will help u in having a better knowledge and correct perspective.
