"There is NO WAY (ZERO!) that Mail-In Ballots will be anything less than substantially fraudulent. Mail boxes will be robbed, ballots will be forged & even illegally printed out & fraudulently signed. The Governor of California is sending Ballots to millions of people, anyone living in the state, no matter who they are or how they got there, will get one. That will be followed up with professionals telling all of these people, many of whom have never even thought of voting before, how, and for whom, to vote. This will be a Rigged Election. No way!"
The claim is not that it's easier to commit fraud. The claim is that allowing vote-by-mail compromises the integrity of an election. That's why it's important to show that voter fraud is quite rare (your link includes cases back to 1990 at least) and has a fairly high chance of being detected. Colorado, Hawaii, Oregon, Washington and Utah conduct elections entirely by mail. Trump voted by mail!
The claim is not that it's easier to commit fraud. The claim is that allowing vote-by-mail compromises the integrity of an election. That's why it's important to show that voter fraud is quite rare (your link includes cases back to 1990 at least) and has a fairly high chance of being detected. Colorado, Hawaii, Oregon, Washington and Utah conduct elections entirely by mail. Trump voted by mail!