Correct

视同路人

/ shì tónglùrén / 
Strokes

Example

Definition

regard as a stranger; treat like a stranger

1
Nǐ
你
bù
不
yīnggāi
应该
bǎ
把
tāmen
他们
shì
视
tónglùrén
同路人
  
。

You shouldn't have treated them like strangers.