They did though, through the creation and expansion of the secure communities program.. It was attempted to be walked back via the PEP after Obama earned the "deporter in chief" moniker, but yes the DNC did, has and will continue to do so.

Their style is usually more "don't make a scene" then "suns out, guns out" but the end result is ultimately the same.

No, but they did tank any candidates who would've given us a hope of not having to deal with that scenario not just once but three times over so yeah definitely both fucking sides.

They sure aren't doing anything about it either.

Nah, they just committed genocide