First, who is an alien? Any 'human' staying in Europe not of entirely European ancestry. European Jews are allowed to stay provided they do not advocate ideas hostile to the health of Europe. In addition there are exceptions available under certain circumstances. Examples include, a license to operate a take-away restraunt for a limited period or in the case of the advanced east-asians, co-operation on scientific and engineering matters, and finally guest University lectureres.

There are several million colonisers and invaders in Europe and they must be removed.

Broad Options Available

1. Forced deportation to their racial homelands. For economic reasons it might be better to dump them all in sub-saharen Africa. In the case that the alien has money he may be given the option to pay for his own transportation to his racial homeland. All other wealth of aliens will be confiscated. This option is the most extreme.

2. Full sterilisation OR deportation as above.

3. The legal enforcement of a 1 child per alien couple rule. This is an enforced demographic collapse rather like what is actually happennig to the native European folk.

4. Tax incentives for employment of native Europeans. Effectively a tax against employing non-Europeans. This would force a large proportion of aliens out of Europe. Naturally all welfare would removed from alien recipients.

How to deal with mixed-race 'persons' (aproxmiately 1 million in Great Britain alone)
Options
1. Sterilsation
2. Reproduction allowed provided with other mischlings but only 1 off-spring permitted.
3. Deportation to an island or possibly sub-saharan Africa.

How to deal with race mixing Europeans?

They should be offered the opportunity to renouce their behaviour.
Failing that they must have the same fate as their alien partners. We do not want them, they are a subverting force.