>>I heard that just having an Israeli entrance stamp on your passport (no matter what country you're from) will bar you from some nations e.g. https://www.tripadvisor.ca/ShowTopic-g293977-i1733-k6066610-Passport_stamp-Israel.html

When I did my stint in Africa, the South African consulate issued a loose-leaf visa (that can be removed from your passport) for this same reason- because in those days, a South African stamp bestowed pariah status in quite a few places.

My experience in the US: pre-9/11 the US offered a frequent traveler INSPASS process allowing residents of some nations to enter the USA without queues or interviews. I could be on my way in less than a minute. INSPASS was replaced by a Global Entry process that no longer is offered to New Zealanders or Australian residents, though it is to Canadians.

IOW the US has discriminated for/against various nations for years, even those considered friends and allies.

Meanwhile somebody with a drink driving conviction cannot enter Canada- presumably because of perception of risk. At least nobody can call that an attack on Muslims since they don't drink ;-) but perhaps beer-swilling Australians and rye-guzzling Appalachians should hold a march to protest the obvious bigotry of those cruel Canadians. ;-)