Why are there few republican voices against Trump?

I am shocked this is how the GOP has become. Senseless voices are praised while sane ones are ignored. MAGA voters are completely onboard with every crazy idea of Donnie. Truly the most ignorant, arrogant, imperialistic and hateful people in America are likely to be republican and for some reason they think they are Christians despite how they behave. What a sick party the GOP now is!