Sahih International: O you who have believed, fight those adjacent to you of the disbelievers and let them find in you harshness. And know that Allah is with the righteous.
Arberry: O believers, fight the unbelievers who are near to you; and let them find in you a harshness; and know that God is with the godfearing.
The following is the interpretation by one of the most trusted Islamic scholars: Ibn Kathir.
http://www.recitequran.com/tafsir/en.ibn-kathir/9:25
THE PROHIBITION OF TAKING THE IDOLATORS AS SUPPORTERS, EVEN WITH RELATIVES
Allah commands shunning the disbelievers, even if they are one's parents or children, and prohibits taking them as supporters if they choose disbelief instead of faith.
Allah warns,(You will not find any people who believe in Allah and the Last Day, making friendship with those who oppose Allah and His Messenger, even though they were their fathers or their sons or their brothers or their kindred (people).
For such He has written (predetermined) faith in their hearts, and strengthened them with a Ruh (proof, light and true guidance) from Himself. And He will admit them to Gardens (Paradise) under which rivers flow.) (58:22)
Al-Hafiz Al-Bayhaqi recorded that `Abdullah bin Shawdhab said, "The father of Abu `Ubaydah bin Al-Jarrah was repeatedly praising the idols to his son on the day of Badr, and Abu `Ubaydah kept avoiding him. When Al-Jarrah persisted, his son Abu `Ubaydah headed towards him and killed him. Allah revealed this Ayah in his case,(You will not find any people who believe in Allah and the Last Day, making friendship with those who oppose Allah and His Messenger.'') (58:22) Allah commanded His Messenger to warn those who prefer their family, relatives or tribe to Allah, His Messenger and Jihad in His cause.
I would appreciate if the Muslim community point me in the right direction here.
My understanding (correct me if I'm wrong) is that this verse is not aim at being applied only on a time of war or dispute but it is a universal rule that applies at all times.
So doesn't this contradicts the famous "There is no compulsion in religion?
If your son or father decides to become a Christian, are you expected to fight him?
What does fight means exactly here?
How do you fight your relatives? Verbal or physical fight?
Sorry if my curiosity makes me ask questions that make you uncomfortable.