That simply isn't true. We have tons of political parties and they are free to run for elections. The fact is there isn't all that much difference of opinion among Americans though the differences are very spirited and entrenched. They seem bigger than they really are. Therefore, there is little difference between the political parties.

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Qur'an:8:39 Fight them until all opposition ends and all submit to Allah.
Qur'an:8:67 It is not fitting for any prophet to have prisoners until he has made a great slaughter in the land.
Qur'an 8:12 I will terrorize the unbelievers...Strike off their heads and cut off each of their fingers and toes.
Qur'an 9:5 Fight and kill the disbelievers wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.