There really is no difference between William and Harry

The two are completely insensitive(DUMB) typical bullies. Hurts people for the fun of it.

 Doesn't think much about his actions because it matters to one not what he does(his actions), but what he gets out of it since its others that cover his costs. If it wouldn't be insult for animals, I would say animals in real sense.

in the sense of imperceptive

Synonyms

unobservant,

unaware,

superficial,

insensitive,

obtuse,

unseeing,

unappreciative,

undiscerning, 

 

in the sense of crass

Definition

stupid and insensitive

They have behaved with crass insensitivity.

Synonyms

insensitive,

stupid,

gross,

blundering,

dense,

coarse,

bovine,

witless,

boorish,

obtuse,

unrefined,

asinine,

indelicate,

oafish,

lumpish,

doltish

 

impercipient

callous

insensitive

heartless

cold

cruel

hardened

stony

inhuman

unsympathetic

uncaring

apathetic

pitiless

hardhearted 

 

cruel

brutal,

ruthless,

callous,

sadistic,

inhumane,

hard,

fell (archaic),

severe,

harsh,

savage,

grim,

vicious,

relentless,

murderous,

monstrous,

unnatural,

unkind,

heartless,

atrocious,

inhuman,

merciless,

cold-blooded,

malevolent,

hellish (informal),

depraved,

spiteful,

brutish,

bloodthirsty,

remorseless,

barbarous,

pitiless,

unfeeling,

sanguinary,

hard-hearted,

stony-hearted,

implacable