I personally blame Obama for changing nothing when he had the presidency though I'm sure there are lot of other liberal failures that have lead to the rise of fascism

Great Man Theory is wrong. Obama was again, a symptom of Capitalism, the Bourgeoisie needed a Neoliberal warmonger and got one.

We should still do anything to stop the fascists from winning power.

Correct, we need to join revolutionary orgs like PSL and FRSO and end support for enablers of fascism like the DNC and GOP.

I don't love the BS narrivate around purity tests

I don't either, liberals need to stop pretending they are anti-fascist by continuing to enable fascism.

Everyone has lines that once crossed we are not willing to tolerate.

Genocide is a major one for me.

The bottom line is there is no viable candidate for president that supports ending Israeli genocide.

Sounds like it's your moral responsibility to get organized with anti-genocide parties.

However if you care about Palestinians at all you should vote for the lesser of two evils. It's the least anyone can do.

There isn't a lesser evil when it comes to the genocide of Palestinians among the DNC and GOP, both are completely in lock-step and want to expand it to a regional war. Walz even supports the "Greater Israel" project.