It’s pretty easy to tell that leftists don’t respect science because they’re always accusing conservatives of that. The truth is always exactly the opposite of what the leftists are saying.
From what I’ve seen, neither liberals nor conservatives as a group have the faintest idea of what science is. Both cherry-pick their favorite bit and pieces of evidence to support whatever conclusion they support. Conservatives are usually undone by irrationality when it comes to evolutionary theory as are liberals when it comes to smoking and climatology.
The liberals practice projection, denial, redefinition, and destruction. If you want to know what they’re up to, listen to what they’re accusing you of, listen to the behavior they most strongly deny or object to, note the redefinition of the terms, and watch which laws, traditions, organizations and, ultimately, lives they are destroying.