Quran 10:21 Makara, Makr=Deception?
Mohamad Mostafa Nassar
And when We let mankind taste of mercy after some adversity has afflicted them, behold! They take to plotting against Our Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.)! Say: “Allah is more Swift in planning!” Certainly, Our Messengers (angels) record all of that which you plot. Qur’an 10:21
Ma’arifulul-Qur’an – Maulana Muhammad Shaffi
“The word … (Makr) used in verse 21:… (say, ‘Allah is more swift in making plans’) means secret plan or move that could be good or bad. Whenever this word has become a part of the local language, care should be taken that it is not rendered as deception’. …
It is obvious that Allah Ta’ala is free from it. The warning given in verse 23: … (your rebellion is, in fact, against your own-selves) tells us that the curse of injustice is certain and, much before matters are settled in the hereafter, one who is guilty of doing injustice must suffer from its evil consequences in this world as well. The Holy Prophet has said:
‘Allah Ta’ala hastens to repay mercy shown to relatives and favour done to people (whereby its blessings start becoming visible in this world, much before the Hereafter). And He hastens to repay injustices done and relationships severed (in that its consequences have to be faced within the life of this world). (reported by Tirmidhi and Ibn Majah with a hasan chain of narrators)
In another Hadith narrated by Sayyidah A’ishah…, the Holy Prophet said, ‘there are three sins the curse whereof falls on the sinner himself: Injustice, breach of trust and deception.’ (Reported by Abu ash-Shaykh and Ibn Marduwayh in Tafsir) (See Mazhari). 
Sayyid Abul Ala Maududi – Tafhim al-Qur’an – The Meaning of the Qur’an
29They practiced deceptions regarding “the Sign of the famine” that had been inflicted on them (vv. 11, 12). This verse alludes to the same, as if to say, “How dart you demand a Sign again, whereas recently the Sign of the famine has been shown to you?
At that time you invoked the help of your deities but in vain, though you had set them up as intercessors with Allah and believed that offerings to their shrines would prove very effective in removing the famine. But you yourselves learned by first-hand experience that those so-called gods possessed no power at all.
Therefore when you were convinced that all power belongs to Allah alone, you turned to Him and began to invoke His help. This experience ought to have convinced you of the Truth of the Message of Muhammad (Allah’s peace be upon him) for this was the very fundamental thing which he was teaching. Instead of learning a lesson from this Sign,
you began to practice deceptions to explain it away, as soon as the famine was over and there had come the blessed rainfall. You invented many explanations (deceptions) concerning the causes of the famine and its subsequent end in order to ‘escape’ from the doctrine of Tauhid and stick to your shirk. The verse is meant to declare that no Sign would convince such people as those who had not benefited from the great Sign of the famine. Therefore there was no use of showing any sign to them.
30″Allah is more swift in His plans than you……” means this: “If you practice deceptions in order to explain away the Sign of the famine so that you might find excuses to evade the implications of its acceptance, in order to continue your rebellious attitudes, Allah is more swift in carrying out His plans to out-do your deceptive methods. He will leave you free to move in your wrong ways:
He will even bestow upon you the worldly prosperity, which will so delude you that you will forget that you were being closely watched and will, therefore, commit evil deeds with apparent immunity and enjoy yourselves to your heart’s content. But His angels will go on keeping a full and complete record of your deeds, which will be presented for your prosecution after your death.” 
Further commentary on the word Makr, Makara, click on the following article here. Also, click on the following links below where God of the Bible deceives, and encourages others to lie:
 Ma’arifulul-Qur’an By Maulana Muhammad Shaffi volume 4, page 538
 Sayyid Abul Ala Maududi – Tafhim al-Qur’an – The Meaning of the Qur’an http://www.englishtafsir.com/Quran/10/index.html#sdfootnote29sym