I am strongly against a private business being able to refuse service to a person/organization on political grounds, even when the "victim" may seem to be performing evil actions, as long as it is not breaking any laws. One should not discriminate on the basis of race, political orientation, gender, origin or religion. Refusing service is clearly a form of discrimination. When you aim that towards your own Government, it may look like a heroic action to your supporters, but to those who are not, you're performing discrimination on the grounds of political affiliation against an organization that is following, as it is obliged to, the law of the Land. If you think the ICE is doing terrible things, you should lob the Government to take action and bring them to justice, but given the Government is, as I understand it, actually mandating such terrible things, you're aiming your fury at the wrong place. You should be protesting against the Government who is mandating these terrible things.

Imagine for a moment that things change completely, and the ICE starts refusing to follow the orders of the Government - but now the Government is leaning towards the far-left, and wants the ICE to open borders to all. The ICE would no doubt have a lot of supporters, but disobeying the Government in such case would ALSO be wrong because in a democracy, the Government represents the people - by not following the orders of the Government, you're basically advancing anarchy. In both cases, the correct attitude is to fight for a Government change. It's not democratic for a Government organization to take its own stance on a topic despite the Government's policies.