As an example, it is very common in US culture to make eye contact in business, but in other cultures this is not the norm and even considered rude or wrong. Many people live in the US who come from Asian cultures where this is the case. When white Americans try to force people to make eye contact and think it is about “respect” they are completely enforcing their way on others and this can lead to marginalization.
Another example, handshakes. Men and women in many cultures and religions do not shake hands because of gender differences, and this is often a matter of respect and beliefs. When white Americans or Europeans try to force people from opposite genders to handshake, even when this is against the way of life for other individuals, this is a form of oppression. And it’s not even far fetched to say oppression exists in handshakes… in many news articles there have been cases where European countries cancelled citizenships or deported people based on someone’s refusal to handshake the opposite gender because of the cultural and religious beliefs.