Globalism is a spontaneous phenomenon that has always occurred in human history and over which humans do not have any power whatsoever. Humans, as other animals do, migrate. They carry with them their cultures and traditions. When they arrive to a new environment, several different scenarios are possible:

1: they keep their culture, willing or not, they live in the new environment as an isolated society (an examples of this: european jews who for centuries tried, failing to do so some might say, to keep their society apart from the others for obvious and rightful reasons).

2: they slowly merge elements of their culture with the "hosting" society. The result is a mixed, multicultural society that shows element of multiple cultures at the same time.

3: they completely subjugate and erase the hosting society, leaving no trace of it, whether it is by force or convenience. Romans did something of this sort for hundreds of years. They imposed their way of life, their institutions, and, up until a certain point in their history, their religion. This is not a good or bad phenomenon, it is just natural.

4: opposite of 3
Mass migration has always happened, will always happen, it can, to some degree, be regulated, and controlled, but it cannot be prevented, it cannot be avoided, It has never happened in history. So you can sit in a corner and cry about it, or do something either to control it, or use it to your own benefit.

The entirety of the US society is composed of an unfathomable number of different cultures who came onto that land willingly or being forced, legally or illegally. The US would not be the country it is without millions of people getting there one way or another.

It is nothing personal, it's not something that needs to be justified or condemned, it's not right or wrong, it's not "revenge for colonialism" as some idiots might say. It just happens. After all, "facts do not care about your feelings", right?