In short, the government is showing what happens to individuals who dare to push back against (or just highlight) unconstitutional acts of cruelty.

From the press release:

    Specifically, the document defines domestic terrorism broadly to
    include "doxing" and "impeding" immigration and other law enforcement.

    Doxing is not specifically defined, but the memo references calls to
    require ICE agents to give their names and operate unmasked.

    Individuals who donate to organizations that "impede" or "dox" will be
    investigated and deemed to have supported "domestic terrorism."

    Therefore, it is crucial to understand that ICE and DHS consider
    people who follow DHS and ICE agents to observe, record, or protest
    their operations as engaging in "impeding." 

    People have a right to record law enforcement during their operations

    People generally have a right to protest, yell out, insult, swear at, 
    and even "verbally interrupt" law enforcement during their operations.

    People generally have a right to post the names of law enforcement agents,
    including undercover agents, unless it is done with a provable intent to
    threaten them.

    People have a right to generally warn others about the presence of
    law enforcement, for example, by holding a sign, honking, flashing lights,
    or livestreaming.

    Honking can only be limited through a content-neutral, traffic-safety
    statute, which does not exist under federal law.

    People may not be arrested or detained, even for real technical traffic
    violations, if the officers are motivated by a desire to retaliate against
    their speech and the arrest or detention would not have otherwise been made.