Rakshasas are the root of all virtues. In the beginning they knew virtue better than others. Having considered all this, you should have adhered to virtue.
धर्मस्य राक्षसा मूलंधर्मं ते विदुरुत्तमम्। एतत् परीक्ष्य सर्वं त्वं समीपे स्थातुमर्हसि॥