My theory is that with multiple political parties and proportional representation, the middle 70% can usually form a governing coalition* either not including o

My theory is that with multiple political parties and proportional representation, the middle 70% can usually form a governing coalition* either not including or outnumbering the 15% in both tails; with only two political parties and winner take all, whoever thinks they risk having 49% will be courting their extremists for all they're worth. * Geert Wilders "won" the Dutch elections back in November, but has been unable to form a government since because the other right wing parties have been asking "if you want us to join you all (Wilders' party), which of your extreme planks are you (Wilders) going to renounce?", thus far to no avail.