Amplification of commentary and opinion is much easier now. It’s also a lot easier to play into people’s fears.
There’s a wide range of political motivations for this sort of thing too. Not just AI taking jobs, but convincing people to vote against their best interests, or even supporting radical religious groups whose values would persecute you. This sort of rhetoric feels noisier than it ever did decades ago.
Everybody gets a platform now, even the bots.