Yes, laziness is another plausible reason behind the choice of target. DDoS attacks don’t require 1337 H4x0r skillz to pull off, and as you say IA is a soft target (probably softer than it should have been). The edgelord who did this might not have even thought of a motive before he was asked on Xitter, and then came up with this obviously bogus reason when he saw that this pissed off other techies.
Either that or, as @anon73430903 noted, this is a Russian op trying to do damage to both IA and pro-Palestinian activists in one shot. Whatever’s going on, this is not the work of either a talented hacker or a serious activist.
