The problem is worse on the right for sure as there's more anti-intellectualism over there than on the left. And there's more religiosity and supporting things based on their religious beliefs than on science/good of society.
But there are plenty on the left who are entrenched in inflexible ideological views as well.
To stay on the current topic, I'm sure their are many on the left who'd remain opposed to drug testing welfare recipients even if studies where done and showed it saved tax payer money and didn't have major negative side effects for society. i.e. they're just ideologically opposed to drug testing recipients, just like a lot of cons are just ideologically opposed to not having it and having recipients using drugs and would rather test them even if it costs more money.
Again, the right is worse, but people stuck in rigid ideologies is a problem on both sides of the aisle.
But there are plenty on the left who are entrenched in inflexible ideological views as well.
To stay on the current topic, I'm sure their are many on the left who'd remain opposed to drug testing welfare recipients even if studies where done and showed it saved tax payer money and didn't have major negative side effects for society. i.e. they're just ideologically opposed to drug testing recipients, just like a lot of cons are just ideologically opposed to not having it and having recipients using drugs and would rather test them even if it costs more money.
Again, the right is worse, but people stuck in rigid ideologies is a problem on both sides of the aisle.