After a recent Instagram post got a lot of politically charged comments, South Korean actor Jo In Sung is getting a lot of online criticism. This shows how past comments can come back to haunt you when public opinion changes.

The issue is about an Instagram post from March 20 in which Jo thanked a health product company he had been promoting for six years. The message itself was normal, but the response was not.

As of April 5, the post had gotten more than 2,200 comments, which is a lot more than the 900 and 200 comments that his earlier posts in February got. People who were watching said that a lot of the answers referred to his earlier comments about exchange rates during a time when politics were very sensitive.

Koreaboo says that the backlash seems to be connected to Jo's remarks about the Korean won's exchange rate after the declaration of martial law on December 3. At the time, Jo discussed how hard it was to make money while filming abroad.

Jo and director Ryu Seung Wan went on MBC's "Questions with Sohn Suk Hee" on March 4 to talk about their movie "Humint." The director said that filming in Latvia started right after the declaration and that "the exchange rate started to rise at that time."

READ MORE: Jo In Sung To Reunite With 'Smugglers' Director In New Film — Here's What We Know

Jo said, "That was the biggest issue," explaining that "the increase in production costs was especially critical since we had to stay overseas."

As more and more people criticized him, some Instagram users asked why he wasn't talking about changes in the exchange rate. One person said, "You said you couldn't film movies because the exchange rate rose during martial law—so why are you silent now when it's in the mid-1,500 won range? Prices are much higher than back then. You should speak up."

Prices are much higher now than they were then. You should say something. Someone else said, "The exchange rate is around 1,520 won now—care to say something? Is it fine now? The country's falling apart."

More comments said the same thing. "The exchange rate is skyrocketing like crazy right now—did we lose the country or what? Why don't you share your thoughts now?" one user wrote. Another said, "You made a big deal when it hit 1,400 during martial law—what about 1,500 now? Please say something consistently."

Others questioned his stance more directly, with one comment reading, "Jo In Sung, what do you think about the exchange rate right now? Just say one word."

Hani's reports suggest that these kinds of online reactions are a sign of bigger problems related to politics and the economy, where public figures are being watched more closely for inconsistencies.

There were also people who spoke out in support of the criticism. Some users on the online community theqoo defended the actor and criticized the backlash, according to discussions that were put together.

One person said, "What they're doing isn't helpful to anyone at all, but he handled it well LOL. What exactly improves by acting like that?" Another said, "Why, though??? Why are they acting like this all of a sudden?!""

Other encouraging comments included "Please sue them. Money is the best remedy," and "Looks like the political trolls showed up on his Instagram."

The incident shows that celebrity statements can be looked at and framed in new ways as political and economic situations change.

READ MORE: Jo In Sung Dating History: 'Escape from Mogadishu' Star Once Blamed his Fame for Being Single