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> So yes, you agree that koinos means "dirty" as in literally just dirty, not the Levitical sense

This is gonna make things very difficult if what I'm writing is not understandable for you. I don't know how to explain that's not what I wrote at all and I don't know how did you end up interpreting it like that.
Words have several meanings. Metaphorical use tends to grow from literal use. If you had a wet dream you were levitically unclean and you removed that uncleanness by washing (and maybe something else I don't remember now). Levitically there are several cases of physical contamination resulting in ritual uncleanness, those are very closely tied.
Now the situation the apostles were in while they were eating was that their hands were dirty. You can get that meaning from understanding the culture at that time, however it's not what's literally being said and more importantly it's not the significance. Even Mark 7:2 has to point out that the hand are koinos since they're unwashed. Why this was important to the Pharisees? Because their tradition held it as ritual uncleanness. Let's go to Mark 7:15, when Jesus explains what 'defiles' man he uses words coming from the root word koinos. Do you really think he talks about physical dirt? Hear ye, hear ye, Jesus says the dirt that's outside man cannot make dirty and it is only mans bodily excretions that can make him dirty! You can eat feces and smear them all over yourself and as long as it's not your feces you're clean as a whistle, let us rejoice!
MATE. Seriously, mate. I parabolised it as strikingly as I could cause I don't think anything tamer will do when you're so out there.

> Yes, this just proves my point.

I'm feeling like we're not both talking English to one another here.
> because it was believed that dirt defiled their hands 

Common is literal, original meaning of the word. Defilement is the significance here, by further context - accusations from religious leaders - you arrive at defilement being ritual or moral. Physical dirtiness is the situation and reason for defilement and an information you can gain from cultural context. Because defilement is caused by physical dirt it is ritual not moral defilement. Later Jesus turns this around and explains that moral defilement, which is caused by evil proceeding from man, is what's of concern to God.

> Even if he was, this was before the Levitical Law was even instated.

But you say God wants men to live under Levitical Law and God does not change. Hmm.

> What does the implementation of the Ceremonial Law have to do with the commandments being shattered?

Original commandments were shattered by Moses because Israel rejected God by going after their idols. It wasn't God's original intent to have Israel under Levitical Law, it was added after the original because Israel turned away from him in the wilderness.
> In the original Hebrew refers to the decrees the Israelites made by rejecting God.

And every translator missed that. Possible but implausible and more importantly we don't have original Hebrew only Masoretic edits. For me the context is clear. It's not pivotal in this discussion.

> This refers to the prideful Israelites that followed the "Law" while still sinning, it doesn't mean the Law is bad. See Proverbs 21:27.

Plausible point but it's not all there's to it. Even through that verse from Proverbs if you don't stop at the letter but read the spirit you can tell that God requires proper moral conduct rather than rituals. It is foreshadowed here and then in NT it's one of the crucial points of Jesus teaching. If ritual was important God wouldn't not talk it down as he did in these fragments of Isaiah. He isn't saying "you're doing great with your rituals, keep it up, but you need to work on your morality". He's saing "Your new moons and your set seasons hath My soul hated, They have been upon me for a burden, I have been weary of bearing.". You're not making intellectual error by thinking that it's just God despising ritual with wrong morality but there is insinuation here that ritual itself