The Animal Liberation Front is known for its methods of forcible liberation. Many omnivores/anti-vegans/anti-ARAs consider these tactics (such as breaking in and rescuing animals from testing facilities or slaughterhouses) to be “terrorism”.
Though I do not speak as someone who has committed illegal acts in order to liberate animals, nor have I done anything outside the average means of protest, demonstration, and advocation, members of the ALF have never harmed or killed any human individual to my knowledge. Neither is their goal to scare or “terrorize” supporters of animal cruelty, but merely to rescue the animals from their abuse.
If anyone against animal rights ever decided to look into the ALF’s own statements on their form of activism and liberation, they would certainly find that they are not associated with any acts of terrorism. Their website offers up a lot of great tips and resources for people looking into the abolitionist side of veganism as well.
In contrast to their methods of action, my own may appear passive. However, in contrast to apologist vegans and vegetarians, my words may sound “militant”. This is why I don’t think there’s any merit to calling an individual or a group militant or peaceful or extreme when it comes to animal liberation - every activist looks tough compared to some and weak compared to others.