I personally don't think Rainflower hates Crookedstar because they are mother-son. But it's probably just a rumor.
In Crookedstar's Promise, Rainflower is Crookedkit's mother, and she was so pride of his bravery and determination (also how handsome he was) but all that changed when he slammed he jaw into a rock at Sunningrocks. His name was changed from Stormkit to Crookedkit, since his jaw would never heal. Rainflower doesn't hate him, but seems to show it like that when she refuses to look at him, probably because she is sad about his new imperfection when he was once so handsome.
Oakheart's parents are Shellheart and Rainflower. Shellheart was a RiverClan warrior and Rainflower was a former RiverClan queen.
Crookedstar's and Oakheart's mother is Lilystem. But in Crookedstar's Promise, in the alligiences it says Rainflower.
Moonstone
It is a rabbit being hunted by WindClan warriors. The rabbit is killed by a monster on the Thunderpath. Crookedkit is not seen. This answer is from the book "Crookedstar's Promise."
His wife pushed him into the wall.
kittypet
Brightsky and Mudclaw. It says so in Crookedstar's promise.
The rhino was the animal that charged at Crooked Kit in warriors. It was however killed by the warriors who were highly skilled in hunting.
The Hate That Hate Produced was created on 17-07-13.
People are not nice, so I hate them. People are not interesting, so I hate them. Music is boring, so I hate it. TV programming sucks, so I hate it. Games are not fun, so I hate them. I am not intelligent enough, so I hate me. The world is hard, so I hate it. In short, this is why I hate everything.
Hate is an extreme dislike for something or someone. Hate only symbolizes hate. There are symbols, like the swastika, that symbolize hate.