And those who disbelieved are allies of one another. If you do (8:73)

Almuntakhab Fi Tafsir Alquran Alkarim

These infidels who deny Allah are joined one to another in mutual intimacy and afford one another mutual help, and unless you Muslims do the same, then discord shall replace concord and the world shall be given to great mischief and perversion of integrity

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(8:73) And those who disbelieve. they are allies of one another; and unless you act likewise. there will be oppression in the world and great corruption. *52

And those who disbelieved are allies of one another. If you do meaning

*52). If the words 'unless you also help one another' in the verse are regarded as a continuation of the preceding verse, they would mean that if Muslims do not support each other in the way, unbelielers do, this would give rise to much mischief and disorder in the world. However, if these words are considered to be connected with the directives embodied in verse 72 onwards, their purpose would be to emphasize that the world would become full of mischief and disorder if the Muslims of Dar al-Islam (a) failed to help one another; (b) failed to provide political support and protection to the Muslims who have settled down in non-Islamic states and have not migrated to Dar al-lslam; (c) failed to help the Muslims living under oppression in territories outside Dar al-Islam when they ask for it, and (d) failed to sever their friendly ties with the unbelievers.
 

And those who disbelieved are allies of one another. If you do meaning in Urdu

جو لوگ منکرِ حق ہیں وہ ایک دوسرے کی حمایت کرتے ہیں اگر تم یہ نہ کرو گے تو زمین میں فتنہ اور بڑا فساد برپا ہو گا