Why was there a white backlash against Chinese immigrants?

Depends where and when, but generally because they upset the prevailing culture which people see as a threat to their ways of lives and livelihoods - such as willingness to work longer hours for less money in poorer conditions and ability to save money while doing it.

I knew a Chinese immigrant family that was resented for being able to afford to buy a house within five years of their arrival. No one considered it was because the whole family sacrificed quality of life to work 12 hours a day, six days a week running a Chinese restaurant when other workers got overtime pay for anything over 7 hours a day and a 5 day week.

honestly i love the walking dead, mainly the quotes. “well, pardon me young man, excuse the [insert bad word here] out of my gosh darn french, but did you just threaten me? ” sksk (of course it's not the exact words)

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.