The bird nest under my rain friend was torn by other birds, and the birds in the nest were also killed. How to explain this with feng shui?

Birds nest in front of and behind the house, which shows their trust in you. It also proves that your house is feng shui, livable, mailing, warm and safe. Now he has been attacked, and so have you from the perspective of geomantic omen. Maybe this is a sign. You should take precautions from all sides and take good care of the birds.