He is said be foolish-minded who makes friends of those that are foes and who hates and slays that are well-wishers and who commits wicked acts.
अमित्रं कुरुते मित्रं मित्रं द्वेष्टि हिनस्ति च। कर्म चारभते दुष्टं तमाहुर्मूढचेतसम्॥