Honestly, I suspect that most people who refuse to update to Windows 11 are already Linux desktop users. Most of us have more than one computer and use Linux on several of them.
It's good that you are willing to acknowledge that. A lot of people on here truly reject the concept that the situation is more complicated than "stop supporting Israel". People are quick to spout that without thinking about the knock-on effects.
There are even people on here who are outright in support of Hamas, an oppressive Islamist group that has a far worse human rights record than Israel.
It sounds to me like you're overthinking it. Download the ISO (or ISOs) of your choice and set up VMs in VirtualBox. Easy-peasy lemon-squeezy. Experiment and try it out with no risk at your leisure.
Associating Joe Biden so closely with genocide demonstrates a lack of capacity for understanding nuance. Supporting Israel doesn't automatically equate to supporting Netanyahu's genocide in Gaza, but it does indicate support for the Israeli (and by extension, Jewish) right to exist. One can simultaneously protest the genocide in Gaza and support a friendly, cooperative Israel.