i don't think you know much about islamist parties and are just grasping for reasons to justify suppressing democracy in certain places.

ennahada (tunisia), pks (indonesia), jui (pakistan) are all examples of islamist parties that have compromised or reached across the aisle at various points just off the top of my head.

besides, isn't the point of democracy to allow people to be led by those who represent their principles? if they are in power, why should the majority expect their elected leaders to compromise those principles?