TL;DR: Multiculturalism and diversity bring economic vitality.

Multiculturalism advocates for the coexistence of people in one society. The concept sees diversity as inherent strength. As a result, the concept often leads to proponents of increasing diversity within a community or a company. While sometimes associated with chaotic results, multiculturalism brings vitality to the economy.

The fundamental economic strength of multiculturalism comes from its ability to attract diverse populations. Whether in a company or a community, diversity means strength. A diverse company would find it easy to attract global talents and thus become more innovative. Diverse populations do not just contribute to the workforce. They also create more opportunities for other people. Immigrants are more likely to become business owners and self-employed. The creation of these new businesses can improve or revive many local economies and potentially provide employment opportunities for more people.

Multiculturalism creates diversity. Diversity is dynamic and chaotic. While these traits carry some negative elements, the opposite of them, stagnation or monoculture, does not lead to economic development and opportunities.

For this reason, multiculturalism is beneficial.

I believe multiculturalism is a cancer. It tolerates bad parts of culture that causes issues.

TL;DR: Some think that multiculturalism sustains colonial power dynamics

Multiculturalism is of course in many ways beneficial to society. Instead of assimilating and becoming homogenous with the dominant culture, minority ethnic groups maintain their identity, distinguishing values and practices; in turn, the blissful coexistence of different cultures contributes to the creation of a flourishing, diverse, tolerant, and innovative society for everyone.

Despite the positive logistical outcomes of multiculturalism, some postcolonial academics have theorised the potentially harmful side of multiculturalism: they argue that, at worst, multiculturalism is a continuation of colonial power structures. Glen Coulthard points out that in multiculturalism, the relationship between minority cultures and the dominant culture is not mutually powerful or dependent, stating that “the master – that is, the colonial state and state society – does not require recognition from the previously self-determining communities upon which its territorial, economic, and social infrastructure is constituted”. Coulthard uses the Canadian and Australian government’s treatment of indigenous people as examples of this – the government (the dominant culture) is not expected to seek acceptance or tolerance from the indigenous people (the minority culture). Some see this unequal power dynamic between dominant and minority cultures as the dregs of colonialism, which is now agreed to have been damaging to society, due to its violent and oppressive principles and methods.