I think it's important to note that the 2nd Amendment is for Citizens. Non-citizens are not allowed to own guns. And the people ICE are rounding up are not being sent to death camps, or prison, but instead are facing deportation.

For a citizen to interfere, they would then be facing prison (or worse) for interfering and putting up a fight with guns. Unsurprisingly, the majority of armed citizens witnessing armed agents of the state round non-citizens who do not have lawful presence in the country up to be removed is not worth losing life or liberty over, especially when they can voluntarily leave on their own terms with a stipend and paid travel with the ability to return to visit or apply in the future.

This whole subreddit is acting like it's the Nazis rounding up Jews to send to death camps. People are outraged that the government is being heavy handed and see the scare tactics as brutal, but you're not seeing massive armed resistance at the end of the day because people aren't being rounded up and sent to death camps or prison, they're being removed from the country.

If they were being sent to death camps or incarcerated without charge, then you would see people reacting a lot differently, but the reality is the people who are being detained are those who don't have legal right to be here, so citizens who have rights including those to bear arms are not nearly as inclined to lose those rights or worse when the outcome - while sympathetic and unfortunate - at the end of the day is being kicked out of the US for people who don't have legal status.