The Quran Recognizes the Hypocrite منافق

And of mankind, there are some (hypocrites) who say: "We believe in Allah and the Last Day" while in fact they believe not. 

(  سورة البقرة  , Al-Baqara, Chapter #2, Verse #8)


 And when it is said to them (hypocrites): "Believe as the people (followers of Muhammad صلى الله عليه وسلم, Al-Ansar and Al-Muhajirun) have believed," they say: "Shall we believe as the fools have believed?" Verily, they are the fools, but they know not. 

(  سورة البقرة  , Al-Baqara, Chapter #2, Verse #13)


 And when they meet those who believe, they say: "We believe," but when they are alone with their Shayatin (devils - polytheists, hypocrites), they say: "Truly, we are with you; verily, we were but mocking." 

(  سورة البقرة  , Al-Baqara, Chapter #2, Verse #14)



The hypocrites, men and women, are one from another; they enjoin (on the people) Al-Munkar (i.e. disbelief and polytheism of all kinds and all that Islam has forbidden), and forbid (people) from Al-Ma'ruf (i.e. Islamic Monotheism and all that Islam orders one to do), and they close their hands [from giving (spending in Allah's Cause) alms]. They have forgotten Allah, so He has forgotten them. Verily, the hypocrites are the Fasiqun (rebellious, disobedient to Allah). 

(  سورة التوبة  , At-Taubah, Chapter #9, Verse #67)

 They (hypocrites) are those of whom Allah knows what is in their hearts; so turn aside from them (do not punish them) but admonish them, and speak to them an effective word (i.e. to believe in Allah, worship Him, obey Him, and be afraid of Him) to reach their innerselves. 

(  سورة النساء  , An-Nisa, Chapter #4, Verse #63)

 Then what is the matter with you that you are divided into two parties about the hypocrites? Allah has cast them back (to disbelief) because of what they have earned. Do you want to guide him whom Allah has made to go astray? And he whom Allah has made to go astray, you will never find for him any way (of guidance). 

(  سورة النساء  , An-Nisa, Chapter #4, Verse #88)

(And it has already been revealed to you in the Book (this Qur'an) that when you hear the Verses of Allah being denied and mocked at, then sit not with them, until they engage in a talk other than that; (but if you stayed with them) certainly in that case you would be like them. Surely, Allah will collect the hypocrites and disbelievers all together in Hell. 

(  سورة النساء  , An-Nisa, Chapter #4, Verse #140)

Is their any Penalty of Turning Back from Islam in Quran?

The Answer is ...................................NO!

4:136	O you who believe! believe in Allah and His Apostle and the Book which He has revealed to His Apostle and the Book which He revealed before; and whoever disbelieves in Allah and His angels and His apostles and the last day, he indeed strays off into a remote error.
4:137	Surely (as for) those who believe then disbelieve, again believe and again disbelieve, then increase in disbelief, Allah will not forgive them nor guide them in the (right) path.
4:138	Announce to the hypocrites that they shall have a painful chastisement:

5:54

O you who believe! whoever from among you turns back from his religion, then Allah will bring a people, He shall love them and they shall love Him, lowly before the believers, mighty against the unbelievers, they shall strive hard in Allah's way and shall not fear the censure of any censurer; this is Allah's Face, He gives it to whom He pleases, and Allah is Ample-giving, Knowing.

Does Quran Impose Islam?

The Answer is .........................................NO!

2:256     There is no compulsion in religion; truly the right way has become clearly distinct from error; therefore, whoever disbelieves in the Shaitan and believes in Al}ah he indeed has laid hold on the firmest handle, which shall not break off, and Allah is Hearing, Knowing.

2:257     Allah is the guardian of those who believe. He brings them
 out of the darkness into the light; and (as to) those who disbelieve,
their guardians are Shaitans who take them out of the light into the
 darkness; they are the inmates of the fire, in it they shall abide.