If you describe a person or their behaviour as uncritical, you mean that they do not judge whether someone or something is good or bad, right or wrong, before supporting or believing them.
例句
...the conventional notion of women as uncritical purchasers of heavily advertised products.认为女人会不加辨别地购买那些大做广告的产品的传统观点...that uncritical view of history.不辨是非的历史观