South Jersey has always been very Republican. The rest of the state is solid Blue. If you notice, there isn't one face of color in the crowd. And it doesn't look like too many people under fifty are there as well. It's certainly not representative of the Garden State and a crowd of a couple of thousand doesn't say much.  The boardwalk in Seaside Heights usually has that many people walking the boards on a sunny Spring day anyway. Much ado about very little.