Hello soulcalm17

[Sheldon]

Public opinion, so-called witness opinion, is subjective.

Can something which is subjective be evidence?

All salient information is evidence, that doesn't mean it is sufficient. The more objectively it can be verified, the more compelling it becomes, the more of that type of evidence you have, the more compelling I'd find it.

When people say there is evidence for X, what they mean is they think there is sufficient evidence that X is true, and so they believe X. When people say there is no evidence for X, they often mean they don't believe X, as there is insufficient evidence, or what is purportedly evidence is of too low a standard.