It can be difficult to think of people who cause us pain in a positive light, much less think of having to forgive, love, and pray for them. However, scripture is very clear what our response to our enemies should be. It is also quite clear in directing us to love and pray for our enemies.
A generational curse is like a disease that is injected into the tree. This poison can travel through and stay in the tree thereby affecting any fruit that attempts to come from this tree. This is not the plan of God.