General lack of understanding:
* Misunderstand: This implies a misunderstanding of someone's perspective, often due to a lack of information or a difference in interpretation.
* Fail to grasp: This suggests a complete inability to comprehend someone else's point of view.
* Lack insight: This implies a deficiency in understanding the underlying reasons or motivations behind someone's perspective.
Empathy-related:
* Lack empathy: This refers to a lack of emotional understanding or the ability to share someone else's feelings.
* Be insensitive: This suggests a lack of consideration for someone's feelings or perspective.
* Lack compassion: This implies a lack of concern or sympathy for someone else's situation.
Perspective-specific:
* See things differently: This highlights a difference in perspectives, but doesn't necessarily imply a lack of understanding.
* Have a different outlook: This emphasizes a contrasting viewpoint.
* Disagree: This explicitly indicates a difference in opinion or perspective.
The best word to use depends on the specific context and the meaning you want to convey.