Religious door-knockers, button-holers and junk mailers engender a range of emotions in their victims which are almost entirely negative. The range includes amusement, boredom, irritation, frustration, anger, and even rage. While others identify the behavior as rude, religious zealots and fundamentalists who engage in “witnessing behavior” appear to be ignorant of several generally accepted social rules.
Extended or repeated "declarations of faith" are considered acceptable if they are projected towards those with a similar world view - in which case you could expect a reply in kind. (“Praise the Lord, my Savior, My Shepherd and my Eternal Helper.” “Hallelujah”)
They are also considered acceptable when directed towards individuals or groups who have freely elected to subject themselves to the experience - such as someone attending a Muslim mosque, a Hindu temple, a Pentecostal service or an American Evangelical Crusade as part of their general education and curiosity about life.
Such "witnessing" is considered to be rude when directed at people who do not fit these criteria because it is an act which makes the perpetrator feel good but causes negative feelings in the recipient.
It is grossly bad mannered when directed towards those who once held the speaker's position but abandoned it after encountering inconsistent realities.
When ex-believers are informed of the "relationship" which someone has with something which the ex-believer has discarded as purely imaginary, this is what they hear:
"The conclusions which I have drawn from my subjective experience, and which I have no interest in logically examining, are far superior to the conclusions you have reached after careful examination of the evidence. I have no respect for your reasoning ability, your theological studies, or your formal and informal education because your conclusions differ from mine. If you don't believe as I do then you must be ignorant, stupid, evil or cursed. You are therefore inferior to me. Let me fix you and show you how you to think correctly.
This is the arrogance of ignorance, not wisdom. This is rudeness, not respect. This is selfishness, not love.