One theme I see repeated over & over again on the fundy sites such as Rapture Ready is that all sins are equal.
God doesn't differentiate between "small" and "large" sins.
All are equally offensive to god and deserving of eternal torture if you're not saved.
Hitting your thumb with a hammer and saying "goddammit" puts you in the same league as Himmler,Stalin, and child-molesting catholic priests.
I have seen opinions voiced however that being a homo is somehow just worse than murdering a few million people or so.
Maybe homos don't just get fried in hell---they get dipped in batter first so it hurts more...
And while the 'religious' have at various times discoursed on the varying types of punishments purportedly enacted for various sins (Dante's Inferno, e.g.), it still all comes down to 'eternity', which is overkill (no pun intended) for mass genocidal maniac or one-time inappropriate minor sinner.
To appease those who might get into bits of trouble over this large disparity, several escapes have been concocted:
1. Last rites - so you can get forgiven for any and every sin just before death. This is a rather contrived and badly considered idea as it has an inequality built into it. That is, the mass genocidal maniac can get last rites before death and go to heaven whereas the one-time minor sinner who dies without goes to hell. That is not justice in any form whatsoever. It is just capricious and stupid. Can't say much more about the idiocy involved in this idea.
2. Related to 'last rites' is confession. This is sort of the continual forgiveness process so that your arse is covered in such an event that you expire without some priest within reach.
3. Neither of these always being satisfactory, it was decided by some churches that 'good' people who've done not-so-bad things don't suffer in hell. They go to an intermediate incarceration called purgatory (lit. place or state of purging). After the 'purging' then they go to heaven.
4. When all else fails, there once was a way literally to buy your way out of hell and into heaven - or at least towards the latter with less penance. These were called Indulgences and worked as replacement for stauncher penances required after confession.
The church has somewhat softened the stance over time as noted. 'If you sin then you go to hell for eternity' isn't the only option. These alternatives and purification schemes were probably put into place to avoid scaring the flock so thoroughly that they'd rather not even be part of the religion.
In some interpretations of NT epistemology though, Jesus died for your sins (all of them, not just the original one). The notion being that if you 'accept' Jesus, sometimes followed by a baptism, then you were purified and simply need to be sorry (repent) for any sins you commit thereafter. This is why suicide is considered an 'unforgivable sin' because the act itself (leading to death) leaves no means of repetence.