Yes Silverstone is alienating potential allies by keeping them out of Tir this is true.
However, as far as I can recall it have allways been an important issue for the neutrals to be treated as induviduals and not as one faction.
So when a number of clans don't want to alienate neutrals, but rather see them joining us, why should that prevent from taking sides with those among us who seeks a peaceful solution?
As it stands now clan Sentinels have controll of Tir and keep a strickt rule, and sadly it is the only rulership we have.
If a number of clans got together and formed a governing body whit or without the Sentinels, preferably with if they can be softened a bit. We would stand much stronger than we are today, and we could start working towards the goal which we all seek, a free Rubi-Ka for all.