I'm not sure of your purpose, but the first half paragraph will say what fairly needs to be said in response to the deletion of your post.
I'd edit it down to : Truth will always stand up to scrutiny if it indeed is truth. Lies can only stand if the truth isn't allowed to be revealed.
The rest is fine if you want to shut your sister out of your life til kingdom come. As true as it is, every bit of hostility doesn't need to come outoday, does it? You know that your posting it will put you on permanent outs with sis, right?