I don't think that's him at all. Paddock doesn't strike me as the guy who would be at an anti-Trump rally wearing a pink pussy hat. It seems he was trying to keep a low profile; no social media, no arrest record, few public photos. Showing up at a rally carrying signs and dressed in pink negates this.
What about the photo of the Asian woman I saw him with? I don’t have time to produce that photo, but it was shown the other day in a post.