paint with a tar brush
v. phr.— «He said he objects to gun owners being painted with a “tar brush” based on the “so-called miscreancy of a few.”» —“Councilman wants city to crack down on ‘assault’ rifles” by Jennifer Wray Suburban News Publications (Columbus, Ohio) Feb. 2, 2005. (source: Double-Tongued Dictionary)
Further reading
What kind of book do people ask for most often in prison? Romance novels? No. The Bible? No. The most requested books by far are … dictionaries! A number of volunteer organizations gather and distribute used dictionaries to help inmates with...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...