This issue of Filioque WAS THE CAUSE of the Schism.
"This issue of Filioque WAS THE CAUSE of the Schism."
I must respectfully disagree. That is an extremely simplistic approach to a very complicated question regarding the scandalous division between the eastern and western branches of Christianity. A detailed discussion on the origins of the great schism is beyond the scope of a post or even a short essay. That said there is an excellent article which I believe provides some good background on the issues which lead to the schism and contribute to its perpetuation.
http://www.arimathea.co.uk/schism.htm
No. The schism initially was driven by POLITICAL issues which acquired a dogmatic ring to them. Politics on BOTH sides pushed things beyoond dialogue or councils.