"Suppose ... there is a fascist party ... and that they have a constituency that amounts to 1% of the electorate"
Given a legislature of 600 representatives, a party with 1% support would have a vanishingly small chance of winning a majority.
Given a legislature of 600 representatives, a party with 1% support would have a vanishingly small chance of winning a majority.
Also, my hypotheticals were meant to be such that you wouldn't take even vanishingly small chances. If you are willing to, then I failed in my argument.
*The factor of 4 comes from the rate of growth of the central binomial coefficients.