It is not possible to be angry at another person and see the other person correctly.
If you are in any way experiencing the other person as anything other than PURE LOVE, there must be some kind of negative attitude in your own mind with which you are seeing them. This negative attitude acts as a BLOCK to awareness, a filter, which is skewing perception. It is showing you something that is not really IN the other person, but is in fact in your own mind. Its your judgement. Your hate.
While you are perceiving others through this filter of hate, it is impossible for you to see them correctly. So if you are not seeing them correctly, how are you able to completely objectively evaluate whether they deserve to be hated or not? You can't. Therefore your hate is always unjustified and in error, and for all you know, underneath a world that SEEMS like it is filled with hate, there could be a world filled with LOVE, that you just don't SEE because you are too busy hating it.
Again the ego has lied, to tell us that its possible to objectively perceive the world at the same time as evaluating that people are enemies or are unworthy or are to be hated or are guilty in some way. If we see this in them, we are NOT seeing them clearly, and we are not being shown a clear view of reality, and our evaluation is now in ERROR. We have become blind to what is actually there.
Only when you look with unconditional love can you have TRUE VISION and SEE what is really there. Otherwise, you are looking with the ego and you will not be able to see.
"I cannot see in darkness but in light" - ACIM