One rather strange verse from the New Testament, specifically John 3:16 says the following:

For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

The verse says that God gave his begotten son, and the word beget/begotten infers that this came about through sexual intercourse.

The word begotten that is used here is called ‘monogenes’ {mon-og-en-ace'} in the Greek language. The basic definition of this word refers to daughters and sons in relation to their parents through sexual intercourse.

So when John 3:16 calls Jesus the only begotten son of God it actually means that God had sex and hence Jesus was begotten, that is we if we are staying true to the definition of the word itself.

Lest a Christian apologist claim that we are twisting things, let us see the word 'monogenes' used elsewhere in the Bible, notice the context this time:

By faith Abraham, when he was tried, offered up Isaac: and he that had received the promises offered up his only begotten [son], (Hebrews 11:17)

So notice the word begotten (monogenes) is used here referring to Abraham's son. So therefore as you can see, in context the word ‘monogenes’ refers to a son of a father which is created through the sexual act between a man and a women.

So there is no escaping the fact that word ‘monogenes’ which means begotten refers to a son or daughter which is produced through sexual intercourse, as we read in Hebrews 11:17 it says that Abraham gave his only begotten son referring to Ishmael, hence this word begotten refers to children produced through a sexual act.

And this is why the Qur'an says:

(112:3 )He begetteth not, nor is He begotten

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You get this doctrine of love due to your understanding of John 3:16 which says:

For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

So the overwhelming majority of Christians believe that this verse means that God loves everybody, the good, and the bad.

Now on the face of it this might sound very pleasing, that God loves everybody, hates nobody and so on, but there is a problem with this concept.

In Christianity there is the concept of heaven and hell, the evil people will go to hell and burn in the lake of fire, while the believers will go to heaven with God. And here lies the problem and contradiction, because how can an all-loving God condemn someone to the hell for eternity?

Does it make sense that God loves you yet he will send you to receive a very painful torment for the rest of your doomed life? Of course it doesn't, therefore this concept of an all-loving God is inconsistent and contradictory, because an all-loving God would not condemn a person to a painful punishment for his whole life.

Now since some Christians know that this is a problem they will counter by using the parenting example. They will say "well parents love their kid's right? Yet parents still discipline their children when they are bad don't they? Does this mean the parent doesn't love his or her child?"

This analogy and example used by the Christians is very weak, , because firstly when a parent disciplines his or her child, does the parent discipline the child for eternity? Does the parent lock their children up for eternity? Off course not. Secondly when the parents discipline their child, do the parents physically and mentally hurt their child for eternity? Of course not.

So therefore the analogy fails, because when God punishes you with hell it is forever, when parents punish their children it is only for a day or two, or a week, or a month at most, it is not for eternity. Parents eventually forgive their child, yet God will not forgive you in the hereafter if you’re not a believer and will keep you to suffer in hell forever, hence the analogy. 

So Christians really do have a big problem with this belief, with 2 choices to deal with the problem, either they admit the doctrine of love is contradictory and inconsistent. Or they admit that their interpretation of John 3:16 is wrong and that God actually does not love everybody, which is why he will send the bad people to hell per the Bible.