disloyal
Judas-like
Trojan-horse
apostate
betraying
breakaway
collaborative
degenerate
double-crossing
extreme
extremistic
factious
faithless
fifth-column
insidious
insurgent
insurrectionary
mutineering
mutinous
perfidious
proditious
proditorious
quisling
quislingistic
rebel
rebellious
recreant
renegade
revolutional
revolutionary
riotous
seditionary
seditious
subversive
tergiversant
tergiversating
traitorous
treacherous
treasonous
turbulent
turncoat
two-timing
atrocious
basest
blasphemous
diabolical
dishonourable
felonious
heretical
high-handed
ill-disposed
immoral
infamous
iniquitous
nefarious
sacrilegious
unfilial
unlawful
constant