For the foreseeable future I will not be travelling to the US for any reason. Canada is safe and there is nothing in the US worth risking my freedom for. I will remain here and I will continue to avoid travel to America as well as spending money on American goods/services.
Instead she flew to Mexico and tried to enter there with new and obviously fake job offer. She was treated like anyone else would, but it’s international news because she’s a pretty white woman.
The starting assumption when crossing any[0] international border is that you don't have a right to enter the country, until you prove otherwise.
People from wealthy Western countries are generally used to just waving their passports and passing through, but that is not nor has it ever been some kind of automatic right. People are questioned and denied entry all the time, should they fail to satisfy the border official of their eligibility for entry under the exact terms of their visa (or the relevant visa waiver program).
I'm very sympathetic to the idea that border officials should have less discretion to deny people entry without very solid reasons, but if you start talking about 'innocent until proven guilty' at a border today, you're not going to have a good time.
[0] International agreements can of course modify this default assumption, e.g. Schengen.
you are right, for immigration its your responsibility to prove that you are not coming in to violate terms of entry. Onus is not them to prove that you are coming to work on tourist visa.