New version available here: vedabase.io

SB 10.3.21

tvam asya lokasya vibho rirakṣiṣur
 gṛhe ’vatīrṇo ’si mamākhileśvara
rājanya-saṁjñāsura-koṭi-yūthapair
 nirvyūhyamānā nihaniṣyase camūḥ
Synonyms: 
tvam — Your Lordship; asya — of this world; lokasya — especially of this martya-loka, the planet earth; vibho — O Supreme; rirakṣiṣuḥ — desiring protection (from the disturbance of the asuras); gṛhe — in this house; avatīrṇaḥ asi — have now appeared; mama — my; akhila-īśvara — although You are the proprietor of the entire creation; rājanya-saṁjña-asura-koṭi-yūtha-paiḥ — with millions of demons and their followers in the roles of politicians and kings; nirvyūhyamānāḥ — which are moving here and there all over the world; nihaniṣyase — will kill; camūḥ — the armies, paraphernalia, soldiers and retinues.
Translation: 
O my Lord, proprietor of all creation, You have now appeared in my house, desiring to protect this world. I am sure that You will kill all the armies that are moving all over the world under the leadership of politicians who are dressed as kṣatriya rulers but who are factually demons. They must be killed by You for the protection of the innocent public.
Purport: 

Kṛṣṇa appears in this world for two purposes, paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām: to protect the innocent, religious devotees of the Lord and to annihilate all the uneducated, uncultured asuras, who unnecessarily bark like dogs and fight among themselves for political power. It is said, kali-kāle nāma-rūpe kṛṣṇa avatāra. The Hare Kṛṣṇa movement is also an incarnation of Kṛṣṇa in the form of the holy name (nāma-rūpe). Every one of us who is actually afraid of the asuric rulers and politicians must welcome this incarnation of Kṛṣṇa: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Then we will surely be protected from the harassment of asuric rulers. At the present moment these rulers are so powerful that by hook or by crook they capture the highest posts in government and harass countless numbers of people on the plea of national security or some emergency. Then again, one asura defeats another asura, but the public continues to suffer. Therefore the entire world is in a precarious condition, and the only hope is this Hare Kṛṣṇa movement. Lord Nṛsiṁhadeva appeared when Prahlāda was excessively harassed by his asuric father. Because of such asuric fathers — that is, the ruling politicians — it is very difficult to press forward the Hare Kṛṣṇa movement, but because Kṛṣṇa has now appeared in His holy name through this movement, we can hope that these asuric fathers will be annihilated and the kingdom of God established all over the world. The entire world is now full of many asuras in the guise of politicians, gurus, sādhus, yogīs and incarnations, and they are misleading the general public away from Kṛṣṇa consciousness, which can offer true benefit to human society.