What is applicable to the individual is applicable to the nation or the state.  If hatred can be appeased by love and kindness on the individual scale, surely it can be realized on the national and international scale, too.  Even in the case of a single person, to meet hatred with kindness one must have tremendous courage, boldness, faith, and confidence in moral force. May it not be even more so with regard to international affairs?  If by the expression 'not practical' you mean 'not easy,' you are right.  Definitely it is not easy. Yet it should be tried.  You may say it is risky trying it - surely it cannot be more risky than trying a nuclear war.

• morality
• peace
• love
• faith
• force
• war
• courage
• scale
• expression
• as above so below