The Democratic Party is not in the habit of "demonizing" their political opposition. That's the favoured tactic of the Republican Party - tear down and denigrate your opponents. When you have no platform and no agenda, it's about the only way left to promote yourself to voters. Don't vote for him. He's evil, and out to destroy the country.
That's why you fools believe the Democratic Party is evil incarnate. Even worse, the evangelical right are preaching this from the pulpit. When all you can do is lie to your voters about the other guy, you don't have much.
The Democrats have a plan, and an agenda. They don't spend time trying to destroy Republicans because the crazies that Republicans are currently running in the general are busy doing that all by themselves. Clinton ran on the economy - "It's the economy, stupid!". Obama ran on "Hope and Change", and Biden ran on "Build Back Better".
When Trump ran the first time he promised a health care plan, and a foreign policy plan, and an infrastructure plan, and a wall, but when you asked for details, he'd smile and say "You'll have to elect me to see them". In fact, Trump had no plans. His POS health care plan, which designated "childbirth" as a pre-existing condition for women, as well as rape and incest. He never produced any plans for any of the other things.