suffer fools gladly
Definition from Wiktionary, a free dictionary
to suffer fools gladly
1. (idiomatic) To be tolerant of stupidity or incompetence in other people.
* 1611, King James Bible, 2 Corinthians 11: 19.
For ye suffer fools gladly, seeing ye yourselves are wise.
* 1912, George Bernard Shaw, Pygmalion
He was, I believe, not in the least an ill-natured man: very much the opposite, I should say; but he would not suffer fools gladly.
 Usage notes
* Nowadays more usually used in the negative, as a description of what someone does not do.