Image worship is based on the principle of love.
Master (to the teacher): “What is wrong with image worship? The
Vedanta says that Brahman manifests Itself where there is ‘Existence,
Light, and Love’. Therefore nothing exists but Brahman.”
The Gospel of Sri Ramakrishna, With the Devotees at Dakshineswar (II)
The manifestation is withdrawn when the ...
I am reproducing the question part:
Dasharatha killed a brahmin (unintentionally) and didn't leave his
kingdom for forest.
Pandu killed brahmin and left kingdom.
Rama killed Ravana, a brahmin, and didn't do anything as parihara.
What are the parihara for sins of brahmin killing?
Let me answer point-wise:
Dasaratha never killed any ...
For this purpose we don't have Mantras but we do have Stotras.
From this page you can learn for example the Shiva Aparadha Kshamapana Stotram, which is asking for forgiveness from Lord Shiva for the faults the devotee might have committed.
Aadau karmaprasangaat, kalayati kalushham, maatrikukshau-sthitam
maam, Vin-muutraa-medhya-madhye, kathayati ...
Before coming to the example, one needs to understand the two types of karma in play here - Prarabdha and Kriyamana. But I will also include Sanchita karma for good order sake.
It is all your accumulated karma of past lives.
It is that portion of Sanchita karma that will fructify in this life. One cannot escape it.
The Vishnu Smriti condemns bestial acts:
Causing (bodily) pain to a Brāhmaṇa; smelling at things which ought not to be smelt (such as excrements), or at spirituous liquor; dishonest dealing; sexual connection with cattle, and (sexual connection) with a man (or non-vaginal intercourse with a woman): such are the crimes resulting in loss of caste. He who ...
Why is killing a brahmin considered sin while killing other caste people is not?
This presupposition is wrong; killing people of other castes is also a sin:
Manusmriti 11.126: One fourth of the expiation for the killing of a Brāhmaṇa has been prescribed for the killing of a Kṣatriya, one
eighth for that of a Vaiśya, and one sixteenth for that of a