I swore at my brother because he clogged the toilet.
Why do you think he clogged the toilet?
How else would someone clog a toilet?
He might not have done it on purpose. You should ask him if he did it before swearing at him, otherwise it's just rude.
Pfft fine.
Clogging a toilet is not really a big deal to curse at someone over. You should try to make sure you have a plunger in the bathroom freely for anyone to use.