Ooh, taking me back to my old job, I love it. Here's the 5-minute glance with a lot of f5ing:
It's a speculative lit review looking at the antioxidant qualities of red wine, rather than the cumulative impact of wine in human beings over any period of time. All of the active studies they cite look at de-alcoholized red wine.
The researchers pay passing lip service to actual alcoholic wine: "Several epidemiological studies suggest that moderate alcohol intake, especially red wine, decreases cardiac mortality due to atherosclerosis." The word "suggest" is several rungs below phrases like "have demonstrated a clear link between" in science-speak.
So, a literature review out of an Indian pharmacy school indicates that certain antioxidants (which are not exclusive to red wine) present in de-alcoholized Greek red wine might be preventative against arterial hardening. From there, you have to look into the cited studies that produce the word "suggest," and the methodologies of those studies, and the cohorts involved, the other effects detected, other controlling factors like additional diet, daily exercise, outcomes, credibility...
Science is complicated. It's sexier to say "wine may have protective heart benefits" than it is to say "certain antioxidants, namely resveratrol, contained within wine may have healthy heart benefits (that may or may not outweigh the negative effects of the alcohol and sugars in wine) in certain populations when combined with these dietary metrics at this exercise standard." Hence the title of your posted study: It's all fine science, but it adds nothing to the knowledge base other than a title built to bounce around Buzzfeed and local news for a week.
So yes, good antioxidants are good for heart health, and wine contains some of those good antioxidants...but there's never been a long-term, controlled cohort study that isolates just the health effects of wine, so it's hard to declare any net benefit. It's myth based on truth, basically, or truth with ten asterisks and a lot of fine print.
