Why do Republicans think Democrats are stealing the election when the only proof has been of Republicans doing so?

There has been nothing about Democrats stealing the election, aside from hearsay. Meanwhile, there are voting machines that keep having errors that favor republicans, republicans trying to pass laws to allow them to stop counting votes that came in on time, but they didn't count on time, and Republicans passing laws to make voters wait in long lines and unregistering voters right before the election. So why do they keep saying it's the Democrats?

Why do Republicans think Democrats are stealing the election when the only proof has been of Republicans doing so?
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