3 yr old and 2 yr old constantly fighting.
This is normal....seperate them for about 30 minutes. I do know these are trying times as it is like htey intinually annoy each other. Tell them they are unable to play together for 30 minutes (but make it 15 min). Although they annoy each other but knowing that they can't make eye contact, talk, play or do anything with the other one for an extended period of time breaks their hearts.
Also, I hated when my younger brother and I fought. My mom would make us hug each other and give on the cheek which when you are mad at someone it's what you feel like doing.