You can probably safely extrapolate that to all races who move to a foreign country. They tend to want to live amongst themselves. Not necessarily for racist reasons, but because it's a bit more familiar and you have an easier time communicating with others speaking your dialect, as well as having similar customs and social norms.
So, racist reasons?
what's not obvious is this dynamic has been going on for over a century and a half in california and the greater american west in general. the white native reaction was at first the chinese exclusion act, then japanese internment / asset seizure.
the difference is this time the legacy white property owners are cashing out (cashing in?) in a huge way in both sales and rent as asians move in, so you can expect it to continue.
it's white flight, but financially inverted. in other words.... asian gentrification.
actually they (the asian you say) would face less discrimination but they just dont know it so they could be also racist by themselve (english is not my best, just trying to explain, of course they are not racist)
I see this in my street, 2 kebabs, one filled with black arabs with hallal meat, the other one being « american organic kebbab » and filled only by 35+ white people. it saddens me because ignorant me was thinking people will mix together at lunch…
Thank you for speaking on our behalf and enlightening us on where we would/would not experience more/less racism.