All Hindus and many Non-Hindus know that Idol worship is considered as valid form of worship in hinduism - It is recognized as one of the several paths that lead to God if not done simply as empty rituals or pompous displays of meaningless worship....but with genuine faith and love.......There are unlimited choices and paths that lead to God... .All paths are equally valid and no path is inferior or superior..as long as faith is the guiding light..
Worshiping the idol is considered as a simple way of letting us humans express our love and devotion to God...
In early Vedic times Idol worship did not exist - it only came out later - maybe because the very learned and erudite scholars concluded that it is in human nature to connect better with a 'personal form' of God rather than with his Nirakar (formless)...roop - as an abstract concept.
Hence while God is definitely Nirakar....God can still take thousands of aakara (forms),,, and become your personal God.....for you to love in any relationship you want... like a father, like a mother...an elder brother.. sometimes even a lover like Meerabai saw Lord Krishna...or like how Radhika sees the Lord as her best friend and confidante..
Just like how a pregnant woman loves the child in her womb but is desperate to see it and when the child is finally born the immense pouring of love is incomparable to that of the 'invisible foetus'...
Similarly having an idol to see and worship allows us humans a chance to show our devotion.....so we offer the best food to God, the best flowers...the best clothes... everything that man can do in their limited ability to show someone how much he love them... put simply the very human ways of showing affection towards God.
Loving this personal form of God gives greater pleasure and greater sweetness to many people than worshiping the Nirakar form of worship...
In Hinduism NO path will lead you to God if devoid of Bhakti ... in front of the true Bhakt both the Karmi and the Gyaani will be defeated....
Karmi will achieve heaven but not God. [In Hindu philosophy going to Heaven is NOT the same as Salvation]
In fact Gyaan (Knowledge) without the right desire of god realization is considered leading to path of darkness...
Hence embracing our ignorance because of indisputable faith is the mark of a real Bhakt...and Idol worship is in a way admitting to God - I know you are omniscient and omipresent and formless and I can never really know you through my sense and logic..only through my faith....
Literally speaking Murthi Staphana in a temple means establish the breath of God in the Stone image... It used to also be called as Prana - Pratishta.... It is like God is agreeing to descend into the Idol and the bhakt has vowed to serve the Idol as if it has God's spirit in it... So the Bhakt will do puja every day both morning and evening,,, offer food to god... etc. It is really a very serious responsibility to do Murti staphana and hence is never recommended for homes but only suited to temples where there is a priest who will never fail in these activities.
But philosophically speaking the real purpose of murti-staphana is to awaken the mind of the bhakt through the power of ritual, to the presence of divinity within that sacred image. In the begining the devotee may only see stone or metal and scoff at it ... but eventually as their fath become strong... they begin to see God.... The real staphana/installation is NOT of the stone or the Metal idols in the temple but that of God in the minds of the devotee. This is the power of ritual leading to formation of Faith.
Hence Shastrijie says 'Logoin ki ismein Aastha hai.. Manyata..hai.' ....
I dont know enough about removing an installed murti and installing it elsewhere especially for the motive of personal gain but I would guess that it would be a grave departure from the protocol of ritualistic worship... the temple is the Idols home...Unless under some threat of desecration, the Idols are never removed from their 'home' ...
I am not sure what repercussions this will have... but they might be serious...