Actually, you said that a believer can commit suicide (and stay dead) and be forgiven of it. This is wrong for three major reasons.
#1. Teaching that a believer can commit suicide and still be saved gives them the "green light" that they can kill themselves, whether you want them to do that or not. For all they want to hear is... will they make it to Heaven? You are saying in some cases that is a .... "yes." So they will kill themselves. This is wrong.
#2. God says he will destroy that person who will destroy their own temple. The body is a temple. If a person destroys the body, God will destroy their soul (i.e. erase their existence after the Judgment).
#3. Suicide is self murder; And we know no murderer has eternal life abiding within them (1 John 3:15).
When Jesus says all sin and blasphemy can be forgiven, he was talking primarily in reference to the sin of blasphemy. Yes, Jesus also referenced other sins generally. But "all" does not always mean "all" in the Scriptures. So Jesus was not referencing all other sins. His focus was primarily on the topic concerning blasphemy. Jesus also does not say this is the only unforgivable sin. He does not say that.
No it does not give them the green light that it is okay to do that Jason, so please stop because you are digging yourself further in a hole of passing false accusations.
The problem you have is thinking that a person who goes this far to where they feel there is no way out are still in their right mind frame to discern right from wrong. Depression is a serious illness that takes a hold of a person with a very strong grasp.
Yet a good majority of those who commit suicide do ask for forgiveness in the process when they go this far.
So again do some intense studying on illnesses such as depression before you just up and condemn these people, and again take the mercy and forgiveness out of the Lord's hands and place it in yourself.
You completely misunderstand that scripture of the body being the temple, as the body is made up of all believers in the church.
This is not to be taken as each individual person, as defile the temple means those who come into the body of believers for the sole purpose of teaching heresy to draw people away from the truth. Jesus is speaking of the spirit of antichrist here that sneak in to deceive the body of believers.
If you take this as each individual then you are still condemning those that get tattoo's, and once again make forgivable sins unforgivable.
No Jesus was not just referring to blasphemy, notice the conjunction there "and"......
He is not saying
all sin of blasphemy, but said
all sin and blasphemy both will be forgiven. He only excluded one sin from that list and that is blasphemy of the Holy Spirit. Sorry you can not clearly see that and want to continue to make sins that are forgivable to be unforgivable. Whatever you will have to answer to the Lord for this when He asks why you did not have forgiveness or mercy toward these people as He commanded !!! I see where your issue is though and that is you want to change the conjunction word
"and" to the word
"if" in that scripture. Changing the word of God is very dangerous !!!