The "Humane" Part of Illegal Immigration

Listening to the many proponents of Amnesty I hear the "Humane Appeal" being made to justify their position on the issue. Lets break the "argument" down into its components.
1. Being "humane" in this case means allowing 12 million or more illegal aliens "legal status" in our country--whether or not they are engaged in otherwise useful pursuits; i.e. employed in agriculture, car washes, motels, hotels, restaurants etc. For all anyone specifically knows they could be engaged in drug trafficking, making drugs, gang activities, serial killers, rapists, etc.
2. Being "humane" allows 12 million or more a pathway to citizenship; when they may not otherwise be considered for citizenship; because of lack of education, age, diseases, or whatever other usual disqualifiers that the government uses.
3. Being "humane" is not specifically defined. Where is the "inhumanity" in following common sense, existing laws, and in protecting the publics welfare? Being "humane" implies that there is some harm being done to an individual or group. Protecting the general welfare, sovereignty of the country, and promoting order does not usually imply, when laws and procedures are followed, that inhumane treatment is being meted out.
4. Being "humane" does not usually mean that carte blanch preferential treatment be given indiscriminately to an ethnic group. Are they being discriminated against in their own countries, persecuted, or otherwise neglected? Is their plight our obligation to remedy by giving them citizenship?
"Humane" is one of those thoughtless emotional appeals that no one questions out of fear of being labeled "heartless" and "mean spirited". It would seem in reality that those using the humane slogan are the ones being "mean spirited"; for they are being dishonest, arrogant, and thoughtless in their pursuit of gaining amnesty for millions of aliens who don't belong here in the first place.
Are American citizens obligated to give anyone that asks citizenship? If so where are the boundaries, criterion, benefits to us? A lot of emotional appeals have been put forward in promoting illegal immigration but few facts.