I guess they don't believe that G-d made all vegetables. Why would G-d make an Avodah Zara fruit? The Muslims are trying to make G-d not the all powerful G-d.
The "cross" in the picture is because the tomato was altered on the screen. It looks like the image was compressed in an unnatural shape. Real tomatoes don't look like that.
I remember when they said the Coca-Cola trademark was Allah in Arabic and therefore a desecration of G-d's Name. That's a man made thing. Now they are saying G-d made things are a conspiracy as well.