Oh absolutely. Israel's popularity has taken a hit in the US (Down to 58%, source but the Palestinian Authority's support is down to 18% (same source).
And when you look at specifically questions around Israel & Hamas' handling and justification for conflict it's no-contest (source. Nobody thinks Hamas' actions were justifiable. That pew poll is pretty nuanced and lays it out pretty well. Most of Palestinians support is primarily focused on the human cost of the war; which the US is seen to be mitigating with it's air drops and the port we're building.
It's not really surprising either. The older you are the more you've experienced Hamas/PA tactics and PR and the less susceptible you are to it. And Hamas is getting fairly good coverage here. There's rarely a news article pointing out that US citizens are still being held hostage, for example.
You don't have to, but you should. Lenin and Mao practically worshiped Marx and they both attempted to implement his system faithfully to the spec he advocated for. And I know that viewpoint is somewhat controversial in non-Leninist/Maoist circles but I think it's true.
What's more I think the historical records of economic collectivism outside of Socialism and political Authoritarianism outside of Socialism are numerous and expensive enough to justify an opposition to Communism as a system.
I think the main realization that made me nominally support Capitalism is it's performance in a "degraded" state. You can have the absolute worst scenarios (think Pinoche Chile) and Capitalism provides constant incentive to improve things and doesn't seize up in the meantime. It continues to function even in the face of severe inefficiencies.