Are there even enough of us in this country to swing a fucking vote? Why do we keep getting blamed for everything?

No. And because we don't have any power or ability to influence the farcical US federal elections we make safe, easy enemies. There isn't much currency in yelling at Republicans. Dems already believe they're illiterate sub-human monsters. But they see leftists as traitors and they can enjoy imagining that they only lost because we stabbed them in the back, so they can righteously vent their anger at people they believe owe them allegiance. It's more emotionally satisfying than the old, stale conflict with the GOP.