I have one thing to say. Please don't. It's hard to pinpoint what actually it is that drives me off of the thought that your faction is a good Idea, so I'll just list a few.
I frankly do not think that any Russian considers "Mother Russia" to be an actual godlike figure - correct me if I'm wrong, russian community members, but isn't it more like a personification of the Russian state/country? Similar to "Uncle Sam" in the USA or Britannia in GB? So I don't think that you would find enough people to actually comprise a group under a fictional "King Rheinland", let alone that you literally just put a Rheinland flag (funnily enough not even the one that you mentioned above, but the actual flag of the state that you're trying to overthrow) over a picture of the God-Emperor from 40k. I mean please. I know that not everyone is an artist, granted, but that is just lazy.
Oh, next thing on the list: Your diplomacy. You claim to be friendly to the Rheinland Corporations, but at the same time towards the Unioners, the mortal enemies of Republican shipping. You claim to be friendly to the LWB and the Bundschuh, while still being friendly to Daumann and Kruger. You claim to be enemies with the state of Rheinland, but not it's corporations. Correct me if I am wrong, but I somehow doubt that every single of those corps, revolutionaries and whatnot would pile themselves together with a bunch of mad people from the MND. Let alone that I'd be pretty sure that the corps have no interest in overthrowing the Republic - they're thriving pretty well in it.
You are also neutral to House Kusari and her governing bodies while being hostile to the Kingdom of Gallia. Why be neutral to an entity that could be counted as Rheinlands only real friend in Sirius (and I'm talking Republic of Rheinland here)?
You're at war with the Blood Dragons? Seriously? Do you even meet them? If so, where? Same applies to GC, by the way.
You also call yourself radicalized along the likes of the Bundschuh. No. You're not. You're a bunch of War Veterans who want to keep fighting, and go towards the political right. That's the opposite direction of the ones you claim to affiliate with.
That was just a few. I'm tired, so I won't bother to list any more, but to quote myself from above:
Please don't.
Go read what Roleplay means, rethink your Ideas, and then return. Don't try to impose this stuff on the community - you already saw what the response was. You will not be happy with continuing that way.
You might also consider checking out this link. It's a beginner's mistake that many people make - there's certainly no fault in making mistakes, but it'd probably be best to be aware of them to be able to fix it.
While the concept of your faction is interesting, it needs some minor changes. I'd suggest to play for a few months as indie RMs. Write some heavy backups on forums both explaining your statements and slowly turning to separate from the RM themself. While I like the concept of Rheinlanders raiding Liberty, but you will need to put much more effort to make people take it seriously. (background stories for characters, reasons for disagreeing with the ceasefire and upcoming peace threaty, inRP ways to gather more followers, maybe some stories with 'official' rebellion against government's decisions etc.)
Now some questions;
1. Which tree of ships are you using? As ex' Military I think it would be RM stuff, but using it along with Pirate ID will casue some technerfs.
2. Are you using only snubcrafts or capitals too? - It could be problematic to use them with Pirate ID tho... In case of rules, you will be able only to use the gunboat - AND with massive power nerf frankly.
So basically, unless you estabilish some more serious stories, contracts and whatsoever, people will just treat you as usual pirates as there's really nothing big behind you in the very moment. Maybe SRP could help with power nerfs, but as I've told, it will need much more effort to make big guys even consider approving it.