Large amount of dirty tricks switching Dems to Repubs in swing states-why?

[berniew1]

There was a lot of dirty tricks to switch Dems & Greens to Repub. registration in swing states like Florida, Pennslvania, & Ohio- documented by elections official and EIRS reports & Media.
This doesn't gain any votes and makes the voters mad, yet was widely done. Why???

Only thing I can think of is to cover up the fact they weren't going to get enough actual votes to win, and were using it to cover the big Dem advantage in new Registrations so official vote wouldn't look too strange when they switched a lot of votes by touchscreen fraud- which has been documented in about 15 states.

Is this a likely explanation? If not, why would they do it??