one thing more could you please explain ayah mentioned below since such ayah have same word which used in ayah-e-thateer.
(6. O you who believe! When you stand (intend) to offer the Salah (the prayer), then wash your faces and your hands (forearms) up to the elbows, rub (by passing wet hands over) your heads, and (wash) your feet up to the ankles. If you are in a state of Janaba, purify yourselves (bathe your whole body). But if you are ill or on a journey or any of you comes from the Gha'it (toilet) or you have touched women and you find no water, then perform Tayammum with clean earth and rub therewith your faces and hands. Allah does not want to place you in difficulty, but He wants to purify you, and to complete His Favor to you that you may be thankful.)
so, why do not you say person who perfomred wadu is also masoom.
The ayat you mentioned about appears to refer to wazu you do to be purify for yourself for prayers.... now read the ayat below:
And stay in your houses. Bedizen not yourselves with the bedizenment of the Time of Ignorance. Be regular in prayer, and pay the poor-due, and obey Allah and His messenger. Allah's wish is but to remove uncleanness far from you, O Folk of the Household, and** cleanse you with a thorough cleansing. [33:33]**
Read the text of the ayat above and tell me how it fits your context. Its talking about removing uncleanliness** far** from you and a thorough cleansing
Doesn't it indicate this purity is ranked quite higher than what you protray... i don't see a link... unless you want to come up with excuses to ignore the facts.