You can choose any poll you like it will show the same thing. In the West the percentage would be so close to 0% it would be statistically insignificant.
So where you are 100% in your claim that the far-right and Islamist are opposite sides of the same coin, the real difference is the in the middle and left of the West and Islam.
Islam seems a massive in-group preference where a large minority will not turn on their violent extremist Islamic brothers and sisters, whereas the rest of the population would turn on violent extremists in a heart beat.
