People don’t get that freedom from religion means that me, as an atheist, am protected from forced participation in your religious activities. That you are not allowed to use the government to compel or punish me for not participating, but that you can still participate in your religious activities.
Anyone downvoting that concept in disagreement is saying that they want to force their neighbors to be under the rule of religion.
Freedom from religion does not mean that you don’t get to practice. It’s that you don’t get to force me to live under religious rules.