RE: Help me understand why anyone would be opposed to proving citizenship in order to vote

There are a number of things you occasionally need to leave wherever it is you live for. Getting food, registering to vote in the first place, etc. Getting an ID that only needs to be renewed once every 10 years does not seem like an undue burden.

Under the SAVE act you would only need something you should already have. A birth certificate. Those don't even need to be renewed.