I'm going to snitch on my brother-in-law to his mother
Why would you do this? Do you have a problem with your brother-in-law?
He's such a jerk I think why should I bite my tongue on everything he has done?
If you have been wronged by him, then it is fine to let someone know. Otherwise, it is just a waste of time.
I think I have the right to report him if I feel the need.
I agree with you. People that do wrong to others should be held accountable for their actions.