Virtually everything you quote is out-of-context as this unidentified verse is. What did Jesus say about this?
Matthew 12:31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Likewise:
LK.12:10 And whosoever shall speak a word against the Son of man, it shall be forgiven him: but unto him that blasphemeth against the Holy Ghost it shall not be forgiven.
Lk12:10 says it will not be forgiven/pardoned, just like Isa.22:14 below, though Isa.22 puts a limit to it, i.e. till death.
Isa 22:14 But the LORD of hosts revealed Himself to me, "Surely this iniquity shall not be forgiven [purged/atoned] you Until you die," says the Lord GOD of hosts.
Lk 12:10, OTOH, unlike Isa.22:14, does not state the length of time the person will not pardoned/forgiven/let off, whether it is till death, forever, or for this age & the next, etc. We have to look to other Scriptures to determine that, such as the parallel passages (Mk.3:28-29 and Matthew 12:31-32) which limit the penalty for this sin to two ages, "this" age & the coming age:
28 Verily, I am saying to you that all shall be pardoned the sons of mankind, the penalties of the sins and the blasphemies, whatsoever they should be blaspheming, 29 yet whoever should be blaspheming against the holy spirit is having no pardon for the eon, but is liable to the eonian penalty for the sin-" 30 for they said, "An unclean spirit has he." (Mark 3, CLV)
31 Therefore I am saying to you, Every sin and blasphemy shall be pardoned men, yet the blasphemy of the spirit shall not be pardoned."
32 And whosoever may be saying a word against the Son of Mankind, it will be pardoned him, yet whoever may be saying aught against the holy spirit, it shall not be pardoned him, neither in this eon nor in that which is impending. (Mt.12:31-32, CLV)
Since there are Scriptures speaking of multiple future ages to come (Eph.2:7; Rev.11:15, etc), there is the possibility that this sin against the Holy Spirit may be pardoned after the coming age.
Also, in light of the following words we may believe that the sin against the Holy Spirit will surely be pardoned:
Mark 3:28 Verily, I am saying to you that all shall be pardoned the sons of mankind, the penalties of the sins and the blasphemies, whatsoever they should be blaspheming,
If such a horrific thing as eternal punishment were the idea in Mt.12:31-32 & MK.3:28-29, would Christ have used the ambiguous words aion & aionios? No. He would have used words such as eternal (aidios, Rom.1:20; Jude 6), endless (aperantos, 1 Tim.1:4), no end (Lk.1:33), unlimited (apeiron, by Philo). Since He never used such words, He did not teach endless annihilation or torments.
Lam.3:31 For the Lord will not cast off for ever:
32 For if He causes grief, Then He will have compassion According to His abundant lovingkindness.
33 For He does not afflict willingly Or grieve the sons of men.…
Scholar's Corner: The Center for Bible studies in Christian Universalism