americans in greece often get the feeling that they are witnessing an argument when they are overhearing a friendly conversation that is more heated than such a conversation would be if americans were having it.

이 분홍색 부분이 문법적으로 이해가 가질 않습니다

would be는 어디서 나온것이고 누구와 연결해서 해석해야하는지..

if americans were having it은 어떻게 해석해야하고 문법적으로 어찌 봐야하는건지...

알려주세요...!!!!!