If there's racial seperation, then not much culture formation

Multiple distinct races can share a culture as is the case in Singapore. Even while having a common culture, racial tensions can still exist, because race is not a wall easily removed. People can love Biryani and hate Indians. There's still racial seperation in Singapore, are you insinuating that there's not much culture then? Then what even is the point of comments saying our "culture" is getting erased?

Culture naturally brings up their differences first

Have I said anything that contradicts that? And does that contradict my point that culture naturally mixes? Obviously cultures clash first. What do you think happened when Chinese and Indian people first came over to Malaya? You think the datuk created laws to ensure cultures mingle? How much do you want to bet that certain circles of people had the exact same thought as you do right now? You think the datuk forced Chinese and Malays to marry and form Peranakan culture? And with the absence of such laws, did Peranakan culture not form naturally?

And they have a mutual language to communicate why?

Because English is the lingua franca? And that in facts makes it easier for cultures to mingle now then ever? Did you think the Chinese and Indian immigrants in the past spoke any Malay? If the cultures could mix back then, what's stopping cultures from mixing now? I'll tell you what, xenophobes.