Think of all the votes in safe seats. If the runner-up got 6,000 votes, 6,001 of the winners votes count and the rest don't. Note also that you ignore the abstainers, even though they are electors and note also that you mentioned the masses of people refused a ballot because of the ID fraud. Oh and then there's the postal vote fraud. As a proportion of the electorate, The Sturmers got about a nominal 20%. Only fools and frauds vote in FPTP elections.