I（主语） did not like（谓语） to leave my family alone（宾语）, （定语）ignorant of their enemy.

= I（主语） did not like（谓语） to leave my family alone（宾语）, who are ignorant of their enemy(非限制性定语从句.）

who are ignorant of their enemy为非限制性定语从句，修饰先行词“my family” 

参考译文：我不喜欢将我家人置之不顾/不理，对他们的敌人毫不知情。

重点单词短语解析

(1)like to do sth 喜欢做某事

(2)leave sb/sth alone 听自便；随…去；不打扰，将..置之不理；不理睬

(3)ignorant of 对...毫不知情

(4)leave sb/sth alone 听…自便；随…去；不打扰（英文解释：If you leave someone or something alone, or if you leave them be, you do not pay them any attention or bother them.）

Some people need to confront a traumatic past; others find it better to leave it alone. 

有人需要直面过去的创伤，有人则觉得不去想它为妙。