Khalid Ibn Al-Walid (RAA)
Remember the story about Khalid ibn Al-Walid? It illustrates an idea about mis-perception and a cause of it.
When Khalid went to Yalam lam, the people from there should have said “aslamnaa” (which is the correct word).
Instead, because they did not have the Islamic vocabulary yet, they said “saba’naa”, which made Khalid’s “filter of the mind” go back to his Quraish (“jahalillyah) days and think about that word in a negative, insulting, impolite way.
As a result, he became angry and killed some of the new Muslims from Yalam lam and took others prisoner.