There were barely more than 100,000 Japanese Americans.
This business of "round ups" pretty much depends on how many in the target population. For example once we take back our country from the Democrats we need to "round up" and incarcerate Democrat politicians ~ so that'd be how many? Maybe 200,000 people ~ right ~ which is quite doable.
However, we must also evaluate the additional costs of government imposed on us by the Obama Regime and make sure that ONLY DEMOCRATS pay those costs. That will probably entail heavy taxes on millions and millions of people, many of whom are not actually used to paying taxes.
I can see them refusing to pay so what will we do? Obviously we'll need to incarcerate some of them. On the other hand the Mob has been able to extract their own special form of taxes pretty much without the use of jails. They have other techniques. We may need to consider such things.