I wouldn't go so far as to say that science is completely credible, but when people want respect, they claim to be scientific. There are at least two IRS certified religions that have incorporated science in their names.
No one seems to use science as a pejorative.
That doesn't just apply to the creationist/scientist debate. Look at the number of quacks who use scientific-sounding words and terminology to hoodwink people into buying their particular snake-oil.
Didn't the late Sen. William Proxmire opine that the only science he ever took was ex-lax? From my readings it appears he was virulently anti-science and used the word as a perjorative every chance he got.