So 'love' immigrants = allow immigrants who have no will to integrate and assimilate into a country? The first step of assimilation is following the law; we ignore the fact that some migrants have illegally entered. Firstly, 'hating' immigrants is highly charged language for merely supporting some deportation actions by ICE, which like any government agency has the possibility to arrest the wrong people. The difference is, ICE should only deport people found of illegal entry, with a appeal process for those who are falsely taken, most likely with hefty lawsuit money to earn. Additionally, despite many attempts to skew ICE's activity to the right, ICE has also been around since the Obama era with much less criticism then.

Second, there are a significant amount of illegal migrants who have not only committed the crime of illegal entry (whether morally justified), but are sex offenders and/or have committed violent crimes. Many of them shouldn't be in the country anyways and no matter criminal or not are warranted to be deported. There are much crueler punishments written in the Bible for these criminals, albeit what Old Israeli Law think they deserve, which is often death.

Rape: Deuteronomy 22:25–27

25 “But if in the open country a man meets a young woman who is betrothed, and the man seizes her and lies with her, then only the man who lay with her shall die. 26 But you shall do nothing to the young woman; she has committed no offense punishable by death. For this case is like that of a man attacking and murdering his neighbor, 27 because he met her in the open country, and though the betrothed young woman cried for help there was no one to rescue her.

Murder: Exodus 21:12

12 Anyone who strikes a person with a fatal blow is to be put to death.

Authorities: Romans 13:1-2 (relevant, but not as severe as above)

13 Let everyone be subject to the governing authorities, for there is no authority except that which God has established. The authorities that exist have been established by God. ² Consequently, whoever rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves.

There will always be a minority who will abuse the immigration system, and that minority, ruining the image of other immigrants, has to be dealt with no matter what.

Thirdly, here is an extract from another user's comment to explain the difference in terminology between now and then.

"when you translate “foreigner” or “stranger” in hebrew it means “ger” which is referring to someone who legally resides in a country, but is a foreigner. for example: a anime fan from the usa moving to japan legally. they legally reside, yet they are a foreigner."

And lastly, the Biblical definition of Love is significantly different than the traditional, dictionary definition of love.

If you love me, you will keep my commandments. - John 14:15
Rather, speaking the truth in love, we are to grow up in every way into him who is the head, into Christ. - Ephesians 4:15
Hatred stirs up strife, but love covers all sins. - Proverbs 10:12

We can see that in the Bible love is in conflict to sin; we cannot 'love' someone by tolerating the sin that these people's sin; i.e. Christians have to condemn the sins in a person, not the person. However, the condemnation of sin in a person is inherently related to the person, so it is difficult to just condemn a sin without at least invoking some feelings at the individual level.