When you argue for good things based on the untruths of religion, you justify others using it to defend bad things. It dismisses facts.
Similarly, when you advance your policy using manipulative PR, you're justifying your opponents doing the same. You're insulting voters' reason.
One of those topics generates millions of fanatical zealots who will not stand for opposition to their cause, or opposition to their leaders' words and teachings, including going to war and killing hundreds of thousands to defend them, and willingly engaging in acts of racism, sexism, and ageism in support of their leaders, wishing for these ideals to go on forever.
The other is religion.
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