> Developed countries' citizens consistently outmatch people from undeveloped countries when in comes to immigration crimes almost everywhere

[Citation needed]

Just an example, it is assumed the US has around 11Mi undocumented migrants (rough number). Switzerland does not even have that many people.

Almost always, but not everywhere. For US, yes, other American nationals make ~50% of their illegal immigrants, and that's a phenomenon on its own.

But take a bigger sample. Swiss were biggest offenders in Hongkong, Macau, and dozen other tropical vacation destinations.

Few years ago, Singapore's biggest offenders after Malaysians happened to be US citizens.

India, complicated story... but if you not count Bangladesh citizens, and stateless, I think almost all of OECD members will get to the chart

Vietnam, heard that they struggle with US citizens in recent years as well, though mostly Vietnamese Americans

African countries, a known story - tourist overstayers

Wow really? Interesting! Citation needed please!