Because they’re shitty people and threats and intimidation are the only way they can win. We don’t do the same thing, because we are better than them. Stooping to their level would make us just as bad.
Stooping to their level on campaign tactics would not make us just as bad, because our means are equal and the ends we want to achieve are nobler than theirs.
What part is flawed exactly? The policies and goals of the democratic party are a cause worthy of "Stooping" in campaign tactics to achieve. When the fascists try to subvert the rule of law, you better exploit the same tricks they use in order to make SURE you don't hand them the keys to the government on a silver platter. Play by their rules, then fix the issues with the rules that they play by. We can't afford to let them win.
Being better than you isn’t a weakness. Your ego causes the delusion which makes you believe such a ridiculous claim. That is the weakness I would exploit.