The “paradox of tolerance” is people justifying attacking people. This myth does nothing but ensure there’s no way back for people who have drifted out of bounds - it’s a recipe for radicalizing people.
The vast majority of Christians have spent your entire life moving more towards the middle. Yet, all you see is the ground that hasn’t been covered yet. When you push them (not me) back and pretend that they should be judged by the actions of their ancestors instead of their own actions, you make it that much more challenging to have them stay in-bounds, or move back in if they have gone astray.
When you compare the Christian Religion that two-thirds of the US shares, to the secular Nazi Ideology, and claim they have blood on their hands, you push them towards radicalization.
When people that support your stance go out-of-bounds themselves, and aren’t called on it they make it that much harder to show the way back in-bounds to the opposition that have strayed.