Lynchings were not always reserved for blacks nor were they solely conducted by whites. It's also not an American thing, it is human nature and exactly why we have a legal system. There were some racially motivated lynchings of course but to reduce it to that is misleading. Approximately 40% of lynching victims were not black.

If you wanna read something awesome, look at the account of this guy's encounter with a mob that wanted to lynch him: https://en.wikipedia.org/wiki/Laurence_C._Jones