There are hundreds of examples, if not thousands from across the country and in Europe. I am only assuming that you said this because you had no idea and didn't want to believe people could actually support hamas. I don't want to assume that you have seen it and are pretending like that is not what is going on. But here is one example from Philadelphia.
Wildly, it is common for our media to refrain from calling hamas, terrorists. They're referred to as militants or fighters. And in every two sided story, they take the word of hamas over Israel even though Israel provides indisputable evidence time after time. So if you're only getting your knowledge of the Israel/Arab conflicts from the mainstream media, it's understandable why you didn't think people were actually marching for hamas.
So in the streets of NYC blocks from where our towers fell and over 2,000 people died, these animals were calling for us to be killed like the jews. Also calling what hamas did, holy intifada. Which is merely an uprising against the occcupiers, not a savage, evil and gross terrorists attack against unsuspecting civilians, many from all over the world. Not just jews.
Before we feel bad for Palestinians, let's just remember who they are. They are brainwashed demons that when given the chance will kill for the idea of martyrdom. They are taught early to hate jews and infidels (like you and me) they are not all hamas but the vast majority of them support hamas. Which makes them the same evil as hamas. The top heads of hamas don't even live in Palestine. While the people they 'represent' live in hell and poverty, they live lavish lifestyles in paradises as billionaires. They steal aid, food and other goods from their own people and keep them in a state of dependence. And they convince their low IQ populace that it is the jews that are the oppressors. Palestinians are used as pawns by the Arabs and aren't even treated as humans by the very people who cry about their supposed genocide. Over 20 Muslim nations voted on taking in Palestinian refugees. Zero voted in favor of it. Egypt went as far as saying they would wage war to keep a single Palestinian from migrating to Egypt. Wonder why...