Many European Country will now only give citizenship to Thai (and others) if the they renounce their previous citizenship. One of the reason to still be a dual passportholder: if the cost of giving up your natoniality is to "high". Someone who know how much a Thai, have to pay for give up their citizenship.

http://www.udi.no/templates/Tema.aspx?id=7397#who%20can

The US allows dual citizenship.

To use Norway as an example, the UDI website acknowledges that whilst in principle an individual must renounce his/her other nationality in order to become Norwegian, this does not actually prevent him/her from continuing to exercise citizenship of that other country.

Essentially, if the Thai authorities still recognise you as being Thai, there's nothing the Norwegian authorities can do about it. Therefore, it is still possible to hold two passports, although, in this example, whatever Norwegian immigration status was endorsed in the Thai passport would cease to be valid once Norwegian nationality is granted.

Scouse.

The US allows dual citizenship.

http://www.uscis.gov/files/nativedocuments...enship_2004.pdf

The US recognizes that dual citizenship exists but doesn't endorse it as a policy because of the problems/conflicts that could arise.

Many European Country will now only give citizenship to Thai (and others) if the they renounce their previous citizenship. One of the reason to still be a dual passportholder: if the cost of giving up your natoniality is to "high". Someone who know how much a Thai, have to pay for give up their citizenship.

http://www.udi.no/templates/Tema.aspx?id=7397#who%20can

why would anyone have to pay?

Its hardly many european countries is it?

Its just one....which isn't even a member of the EU. Bit of an over reaction by the OP methinks!