Your argument seems to boil down to: “bad things have happened before, so bad things aren’t bad”.
1. In a close election, contesting it or demanding a recount is fine and sane. Step aside once the results of that process are in. Trying to discredit the entire system with a mountain of bullshit and overthrow an election when it is overwhelmingly clear that it did not go in your favor is an incredibly dangerous road for us to go down. The two practices are incomparable.
2. I can’t understand this argument. Are you saying that 1.6.21 must compose a minimum of 51% of all violence in the US over the past several years before it qualifies as an issue?
3. Presidents inciting their supporters to violently overthrow elections that did not go in their favor is not a thing that has happened plenty recently nor should it ever.