Any public gatherings are going to be cancelled, religious ones included. I would agree with you, we have liberties in the Constitution to meet together, but there are exceptions for health reasons. The coronavirus is a public emergency, luckily we have the Internet to help us with our worship. Heck, we are using the Internet to communicate NOW. Sometimes we are too quick to freak out about things. Quarantining for a few weeks is NOT a big deal if it means we can slow the spread of coronavirus to the point where we don't have to worry anymore.
The coronavirus symptoms can take up to 14 days to show up. (Source: https://www.healthline.com/health/coronavirus-incubation-period) and in that time period you can spread it to anyone within 6 feet of you. Ignoring public safety rules to have your own fun is not only selfish but dangerous.
As for the overall topic: NO, religious liberty is not being threatened. Over 76 percent of Americans are still religious (Source: https://www.pewforum.org/religious-landscape-study/) and it is ridiculous to victimize yourself when you are in the majority. Atheists are still attacked and in eight states cannot hold office. (Source: https://www.inquisitr.com/1357238/atheists-are-still-not-allowed-to-hold-public-office-in-eight-states/)
I absolutely agree that antitheists have been hateful and horrible towards religious people, but these people are a very small minority. My experience being a Mormon hasn't been difficult. It usually goes like this:
Me: I'm a Mormon.
Person: Oh, okay, cool.