Please do not message the page owner just report the page so facebook will shut it down. This promotes violence, hate, discrimination and animal abuse. Pages like this should never be allowed from the start! Please end this cycle of abuse.
https://www.facebook.com/pages/Cats-are-evil/110951605639440?fref=ts
Next to messages on the page you will see a little * icon. Left click onto that star * Icon and then left click onto report Page.