Expressing doubts is the exact polar opposite of what church and religion is about. Anyone telling you otherwise is blowing smoke up your backside.
It is an essential part of establishing the echo-chamber of bald faced lies that are at the heart of why people get suckered into having faith; alongside other exploitation of mental failings like bandwagon, glittering generalities, fear-mongering, and ritualistic indoctrination.
It's why excommunication exists, it's why organized religions universally teach you to look down your nose at anyone who doesn't believe, and to ridicule, banish, exile, or isolate anyone who DARES to question the noodle-doodle nonsensical exploitative FAIRY TALE.
The attitude you are describing is nothing more than the natural result of this. I've said a variation of this for near on my entire adult life (so over three decades): no matter how much people use the words love, tolerance, and enlightenment, all that is peddled from every pulpit is bigotry, hatred, and ignorance.
The last of which being the most offensive part, as it's how you get to sucker people into thinking that hate is in fact love.
Because tell me again how Jesus is love. Ok, now read Matthew 10:34-37. And that's the new Testament, don't get me STARTED about the old.
To be brutally frank, "faith" should be treated as a mental disorder. The only reason it isn't is that it can't be a disorder if it's the norm... and that's why normal is so screwed up, that right now what people are really worshiping in narcissistic sociopathy.
For those who don't know what that means, basically it boils down to "me, me, me, F*** everybody else". The rally cry of Christians, Conservatives, Libertarians, and just plain guys from Montana.