They're easy to manipulate if you play off their basic tribal fears and religious bigotry. The Democrats are far from a perfect party but they at the very least aren't openly bigots.

They do sometimes but a lot of the time Democrats don't use the same tactics or target that demographic.

Because honesty and integrity matter for society. We're trying to create a better world, not replace the Republicans with Democrats who behave just as badly but have a different name.