Just wondering if this had its origins in a "questionable' time and should be avoided. For example, if it were used during a time of predjudice against Chinese laborers, or used to refer to their behavior, then it might be said to have questionable origins.
Even if those roots are unknown to most people, like the word 'gypped' it could have prejudicial undertones.
Best Answer
According to wikipedia,
With reference to its origins, reading before to mean in front of, not predating:
The wikipedia article also offers some notes on modern usage, including in induction ceremonies and in other contexts, such as:
Negative references include the May Fourth Movement:
Modern colloquial usage sees the word in a more derogatory light:
The Free Dictionary offers several synonyms, of which the following are among the less unprintable in polite society:
You ask in relation to the origins of the word:
The simplistic answer is no.
The origins are rooted in imperial China (or before), performed by Chinese to Chinese, so it does not originate from racist roots. However, to kowtow to someone, whether physically and metaphorically, speaks of a vast difference in status. Although modern usage is split between honour codes and derogatory references, it is often (possibly always) derogatory when not offered voluntarily.
In particular, in the absence of an honour code as context, saying that someone kowtows to someone else doesn't normally carry the literal sense of prostration. At best, it carries the connotation of grovelling.
In light of all this, the fuller answer is that because the term is recognisably ethnic, using kowtow instead of (say) grovel does carry some racist overtones, particularly when applied to someone interacting with a person of a different ethnicity.