There's a lot of stupidity on both ends of the political spectrum, but the nature of conservatism seems more prone to conspiracy generation because it's essentially a bunch of political viewpoints that culminate to: government is bad.

Just look at a list of popular conspiracy theories, if you start to label each one... there are generally common threads of anti-government rhetoric. https://en.wikipedia.org/wiki/List_of_conspiracy_theories

Everything from chemtrails to roswell and the moon landing hinge on "the government is trying to fool you" rhetoric.

There are plenty of dangerously bad liberal-leaning conspiracy theories (liberals and conservatives share fault for anti-vax), but it seems fairly obvious that conservative-based theories outpace them in volume.