The God of Forgiveness, Love and Mercy

I have been chastised for concentrating too much upon the Old Testament, which speaks of God the vengeful, the punishing, the annihilating. 
I should place more emphasis, I'm told, upon the New Testament which speaks of God who is full of Forgiveness, Mercy and Love.

Just for a moment let us examine this Forgiveness, Mercy and Love:

(Mathew 13:41 + ) "The son of Man (Jesus) will send forth his angels and they will weed out of his kingdom everything that causes sin and all who do evil and will throw them into the furnace of fire; in that place there will be weeping and gnashing of teeth."
I find the use of the word "everything" most interesting. Which "thing" causes sin? 
Up to now I was under the simple impression that only man/woman can cause good or evil.
No stone, no plant no animal can cause sin or be sinful

So we are pretty well stuck with Mankind which gets cast into the fires of hell - forever - 

and the non-devouring flames are real and will cause suffering and indescribable pain for all eternity.

(John 3:36)  "Whoever believes in the Son has eternal life, but whoever rejects the Son will not see life, for God's wrath remains on them"

(Thessalonians 1:8-9)  Those....who do not obey the Gospel of our Lord Jesus, they will be punished with everlasting destruction and shut out from the presence of the Lord, forever.

(Mark 16:16)   Whoever believes and is baptized will be saved, but whoever does not, will be condemned. (and I assume this condemnation will last for ever and ever.into all eternity.)

There are, in the New Testament, so many references to everlasting hell fire and the eternal suffering of those who have sinned. There are too many to list here. Let the few cited here suffice.

The God of the Old Testament simply killed or caused killing those He did not like. 

Now you live....  now you're dead....  finito
.

The God of the New Testament follows the sinners from the moment of death into all eternity and makes them suffer torment forever.and ever.

The fire is arranged very cleverly so that it does not consume the body but keeps it 'alive' feeling excruciating pain into all eternity.

Some forgiveness, some mercy, some love.

The New and Old Testament also calls God the "All Just"!

It seems to me, and I am not the first one who mentions this, that the Punishment should be commensurate with the Crime.

How 'just' is it then, to allow man, who can sin only for the duration of his finite life on earth to be punished into all Eternity ?

Man's sinful life is finite, but

God's revenge is infinite.

Some Justice.

With this kind of Forgiveness, this kind of Mercy, this kind of Love and this kind of Justice....

Bertstravels

can do without.