Islam critiqued opposes justice; God's punishment negates His mercy?

In answer to the video "Allah is NOT Forgiving, Merciful or Loving"

Just as God's justice becomes liberal and lenient to the deserving faithful, on the other hand those who sin knowingly and persistently and die as unrepented sinners, they will be requited for every misdeed 6:120. Contrary to the former, meritorious group, they havent proved themselves worthy to receive God's gracious forgiveness and so will be bared from entering Heaven 2:174,3:77.

Because their sins were not obliterated and cleansed through forgiveness, as a pleasant reward from God, the cleansing process will have to be undergone through several stages after death. It will start in the intermediary period prior to the Resurrection, the barzakh, then during the Resurrection itself. To some this will be enough but others will need a temporary passage in hell. This cleansing process is called in the Quran "fitna", a word implying the manner by which gold is melted and purified of undesired elements. To picture how fitna works in the hereafter, one can observe how it manifests in this world through tests and hardships.

Like the fire extracts the precious metals from the ore and the torrent washes away the swelling foam of the sea 13:17, humans go through tests and hardships, a purging process that seperates truth and good from falsehood and sin. It is an inner 3:143,179 and outward process 2:143,149,3:167,18:12 offering mankind the chance of bettering, humbling themselves 23:76 and mending their ways

13:17"thus does Allah compare truth and falsehood; then as for the scum, it passes away as a worthless thing; and as for that which profits the people, it tarries in the earth; thus does Allah set forth parables".

Similar imagery is drawn in the Hebrew Bible when speaking of the process of seperation in this world, through blood and destruction, of the wicked from those willing to reform themselves, a process that sometimes causes good elements to be extracted while at other times only the waste and worthless elements remain

Jer5:29,9:6,Ezek22:18-22"The house of Israel has become dross to Me; all of them are copper and tin and iron and lead in the midst of a furnace; dross of silver have they become. Therefore, so said the Lord God: Because you have all become dross, therefore behold, I gather you together into the midst of Jerusalem. And I shall gather you, and I shall blow upon you with the fire of My anger, and you will be melted in its midst. As silver is melted in the midst of a furnace, so will you be melted in its midst, and you shall know that I, the Lord, have poured out My fury upon you".

Another depiction of that process is made in the context of an undetermined future of blissful utopia for the Jewish people. At that time, besides the Jews, only a third of world population will remain, those that accepted converting to Judaism. But they will still be made to undergo hard trials to determine their true hearts, if they have truly accepted Judaism as a religion

Zech13:8-9"..And I will bring the third in fire; and I will refine them as one refines silver, and I will test them as one tests gold.."

The same processing will be implemented on the Israelites themselves, and more particularily the priestly class which happenned to be the most spiritually degraded throughout their history

Mal3:3"And he shall sit refining and purifying silver, and he shall purify the children of Levi. And he shall purge them as gold and as silver".

In the words of David, this process of testing every human being leads to the erasure of falsehood and establishement of truth

Ps7:10"May evil destroy the wicked, and may You establish the righteous, for the righteous God tests the hearts and the reins".

This is the fitna, the spiritual smelting process of this world. However if mankind heeds God's guidance, turns to God so as to find the inner strength and resolve for true reform, none will be made to undergo this cleansing process in the hereafter. The believers 110:3 as well as the sinners 5:74 are therefore invited to ever seek Allah's forgiveness and protection from sins because

7:153,4:106,110"whoever does evil or acts unjustly to his soul, then asks forgiveness of Allah, he shall find Allah Forgiving, Merciful".