Baratan, I disagree with everything you say and don't feel like wasting my time stating the obvious in these forums, so i'll make it real short this time.
1. It is not true that Forsworn attack everyone like some kind of mad dogs that Nords want to make them look like. Obviously you have not talked to their king in Cidhna who sounds more reasonable than Ulfric and Stormcloaks.
They are not against Empire either, and as a matter of fact they entered negotiations with the Empire when they took over Markath and the surrounding area. But Ulfric charged the city like a madman and ruined everything. Of course that Forsworn don't want to negotiate with the Nords when Nords don't allow them to have any land. What's there to negotiate, Indian reservation?
Here:
http://theskyrimblog.ning.com/group/lore/forum/topics/cause-and-effect-of-the-forsworn-rebellion?commentId=6452022%3AComment%3A126260&xg_source=activity&groupId=6452022%3AGroup%3A11268
2. Yes there is such a thing as "Skyrim logic". Every fantasy world has a set of invented "laws" that try to be coherent and believable. That's why The Lord of the Rings doesn't have Orcs fighting Teletubbies and Sauron fighting Protoss space shifts.
3. You're setting double-standards (hypocrisy is running rampant in the forum so I'm not surprised, there's enough of it in Talos ban thread I made). You disagree with Forsworn recognizing the player as ally although every NPC in the game has foreknowledge of the player, and every NPC knows who shot the arrow next to them. If I shoot arrow near bandits they search for who did it. If I shoot arrow near neutral/ally NPCs they stand still and don't care. That's just how the game works. If I put on Forsworn armor, they will still attack me from a mile away.
I mean what the hell, how silly is this. If forsworn can't be allies why can Imperials and Stormcloaks be? Do they have a radio and photos of you?
If you don't like the idea of this thread I really don't understand what is the point of your participation here? This is not about how the official version of the game should look like, it's about a mod. You don't like it, don't use it. It's that simple.
Talk about wasting time...
1. Forsworn attack outsiders on sight. They are not mad dogs. I have met the King in Cidna mine. He is an individual and intelligent, however that does not change the fact that the Forsworn attack outsiders on sight. The Forsworn view the Reach as their land and anyone who is not one of them is a trespasser and trespassers must be killed. The King in Rags works with you because it is his best chance of escape. He isn't stupid. The Forsworn simply do not want anyone in their land, especially since Markarth has been taken from them. If these things weren't true - they wouldn't attack on sight.

2. That does not describe "Skyrim Logic". That describes a fantasy world with it's own set of laws. Logic is logic. Period. Inventing a term like "Skyrim Logic" doesn't help in an argument. Something is either logical or it isn't, even if some things are logical in Skyrim that aren't logical in real-life doesn't mean it's Skyrim Logic, it just means that the logic is based on the context of Skyrim. Look up Logic: Hint, it doesn't mean what you think it means.
3. Look up double-standard and hypocrisy, :Hint they do not mean what you think they mean. I disagree with the Forsworn recognizing the player as an ally because the player is not an ally of the Forsworn. Why should they rocognize the player as something he is not? That is not a double standard. You may join the Stormcloaks or the Imperial Legion and they will recognize you as an ally if you do. You may not join the Forsworn and therefor they will not recognize you as an ally because - You're not. They do not have outsider allies. The Stormcloaks and Imperials do not attack outsiders on sight. They may attack enemy forces they recognize, but that is not the same as attacking anyone who is not them. I'll say it for a 5th time, wearing Forswon armor obviously isn't enough to fool them into thinking you're one of them. Just like the Dunmer of Morrowind, the an outsider when they see one. Simply playing dress-up isn't enough to fool anyone.
Make up your mind. Are the Forsworn supposed to be an ally with the player or is the mod supposed to change them into being an ally of the player. They're two different statements. If you want a mod that changes them to allow outsider allies, that's great. But, that is not the same as arguing about what they should or should-not do according to "Skyrim Logic". Changing the Forsworn to accept outsiders is not "fixing" something, it's changing it. Changes are fine, but you should be able to recognize the difference between a fix and a change. The Forsworn attitude towards outsiders is intentional. It isn't broken, it can't be fixed - but it can be changed.