Earlier quoted context omitted.
This is because there is a massive confusion of the political spectrum which is better divided as 4 parts rather than 2. The NYT isn't left at all when it comes to its views on how the economy should be run. But on social issues it certainly is a left rag. In fact, in what kind of environment but the leftomost extremist side could one tolerate the presence of an employee like Sarah Jeong who said such nice things as…
Arguably, the kind of environment in which one elects a President who generalises an entire nationality as criminals and rapists except for "a few, [who] I assume, are good people." If you want to find how low the bar has fallen, understand that one side of the political divide lowered it long before Jeong got there. Your final assertion is not worth addressing.
I don't agree with you that "they did it first" is a valid defense for this behavior, but if it were, it would be a defense for Trump, not for Jeong.