I'm going to assume you're joking and this is a bit. But I'll answer anyway.

All leftists support Palestine against the colonizers who stole their homes and have been ethnically cleansing Palestinians for decades.

It's a basically almost a prerequisite to being a leftist and has been for decades. I have never heard of a leftist supporting an apartheid state like Israel. It would be like hearing a Conservative say they hate the troops.

Nobody has ever said hello back before.

What do I do?

Oh no, it's the beach that makes you old from M. Night Shamalamadingdong