"strong backlash" is a correct and usable phrase in written English.
This phrase is used to describe a strong negative reaction or a reaction of opposition to something. For example, "There has been a strong backlash against the proposed changes to the tax code."
It did elicit a strong backlash on the Republican right.
There was a strong backlash from adults who read and write Y.A. books.
There was a strong backlash against Villas-Boas' decision to not substitute Lloris.
Addressing racial injustice directly is difficult and has inspired a strong backlash in the culture wars.
A strong backlash against whole-language teaching polarized these two approaches to reading instruction.
(By Friday morning many of those Twitter users had deleted their accounts after a strong backlash).
A year after a coterie of new Republican governors swept into the statehouses and put in place aggressive agendas to cut spending and curb union powers, sparking strong backlashes in many places, many of them are adopting decidedly more moderate tones as they begin their sophomore year in office.
For instance, when negative frequency-dependent selection operates in a system with environmental noise, perturbations in one direction can generate strong backlashes, which in turn can fuel selection and cause rapid evolutionary dynamics [ 25].
One might have expected a stronger backlash, especially here.
There has been a stronger backlash against domestic sources of perceived unfairness, both in the tax system and in the strength and wealth of Wall Street.
Building safeguards against overuse today could save Facebook from a stronger backlash in the future.
