I find myself at a bit of a loss on how to reconcile the claims in this thread with the behavior. The premise is that [liberals presumably] need to learn how to help conservatives be more humane. The assumptions underlying that position are that 1) liberals are more humane than conservatives and 2) liberals know what is best for conservatives and humanity as a whole.
Okay. I get the assumptions, and clearly those are reflected within this thread. It's very clear that self-identified liberals believe that they are more humane than those they identify as conservatives. It's also very clear that self-identified liberals believe they know what's best for those they identify as conservatives. What's not clear, however, is that self-identified liberals actually are more humane. There's a lot of disdain and derision being expressed toward the general category of 'conservatives'.
No, the premise is not assumptions about political parties. It's about understanding human beings. Right wing ideology, religious ideology, insist on a certain view of the world that actually affects how people perceive the world around them. It's not "liberals vs. conservatives." It's right wing ideology vs. reality, and the consequences of backward, inhumane, irrational ideology, affect everyone, not just the believers.
Take off whatever tribal labels you think apply here. When beliefs are inhumane and stupid, they tend to be a detriment to society as a whole. Right wing ideology, given the right conditions (which occur quite often), will inevitably lead to fascism in large groups and abuse in small groups.
This is not opinion. It's research, and it goes back decades. All of the very human pitfalls of perception and cognition - ego, bias, fear reactions, wishful thinking, and on and on - even though we all have the capacity for those pitfalls, when they become mechanisms of an ideology, they tend to be reinforced rather than mitigated.
If your ideology includes your very sense of self and value as a human being depending on a specific narrative being true, you will tend to use all those pitfalls to avoid being wrong. You will turn off your critical thinking brain and fall back on whatever defense mechanism makes you feel better about your ideological identity.
Right wing and fundamentalist religious ideologies contain all those mechanisms: don't question, punish dissent, allow authority figures to tell you what to think, accept any and all excuses and explanations to support the beliefs, react to criticism as if your life were being threatened, take objections as proof of superiority and agreement as validation, etc. I'm sure you're familiar with all this.
The antidote, so to speak, is basically the traits that enable good science, rational thinking, and cooperation: openness, critical thinking, questioning oneself as well as authority and status quo, self reflection, willingness to be wrong and change one's mind, etc. I'm sure you're familiar with all this as well.
The latter mindset tends to pool into what we usually call liberal ideologies, and, with no apologies, I will flat out state that the former, the pitfalls of human thought, those minds tend to pool into conservative ideological groups.
Just because some people don't like this topic and what it might say about them or they don't like the tribal label of the person who is discussing these ideas doesn't mean it's not true or useful or backed by observation and research. It's not up to liberals, whoever that is in your mind, to help conservatives. It's up to people of humane values to pay attention to everything we're learning and doing whatever we can to make the world a more humane place, and helping conservatives to rise to a more humane and compassionate world view and take responsibility for what they contribute to the world is one way of doing that.
Personally, I think shaming them also has a useful place. People who don't examine their own beliefs and turn a blind eye to the suffering caused when large numbers of people do the same, they can damn well get used to us holding them accountable for what they contribute to the society we all have to share.
Not only has the question been thoroughly answered, it is actually irrelevant to the OP, which is about the authoritarian mindset of conservatism, why that authority-worship/punishment/judgement/control/fear-of-other mindset is such a force for inhumane policies and attitudes, and about how conservatives can be inspired to be more compassionate rather than punitive in their regard for out groups.