(CNN) When KC Ahlers read the words on the sign, he was stunned.

"Stop asking for money. Let the baby die. It's called Darwinism. Happy Holidays."

Ahlers had been putting up flyers near a shopping mall in Toledo, Ohio, to help raise money for his baby boy, Randy James, lovingly known as RJ. But last week as he was driving by the area, he noticed that someone had responded with a hateful message.

KC Ahlers was surprised to see this sign targeting his baby boy, who was born with two rare disorders.

"I came out. I saw it. Immediately took the one down. There were other ones that were up, but somebody, some other good Samaritans, kicked them down," Ahlers told CNN affiliate WTVG

RJ was born in July with two rare conditions: mosaic trisomy 9 and agenesis of the corpus callosum, according to a GoFundMe page set up by his parents to help cover the cost of his care. The first is a chromosomal disorder that can result in intellectual disability, developmental delay, growth problems, heart defects and other abnormalities. The second is a defect that affects the development of the brain.

Since coming into the world, his parents say, RJ has fought his hardest to beat the odds. In the four or so months that he's been alive, his parents write , RJ has been to at least 15 specialist appointments.

Since he was born, baby RJ has been battling two rare disorders that affect his development.

Though they have health insurance, the bills are adding up. One test ordered by a geneticist cost $10,000.

So, Ahlers and his wife sought donations.

He simply couldn't believe someone who read his sign could have so little empathy.

"It shocked me," he told WTVG. "I mean, it really shocked me that someone would have that kind of cruelty."

Despite the hurtful message, most of the community has been supportive. Angela Ahlers, RJ's mother, told CNN they had received an outpouring of love and support from people as far away as Australia, Argentina and Canada.

"That sign did the actual opposite of what that person wanted because obviously it has gone global," she said.

As of Tuesday afternoon, the GoFundMe for RJ had raised more than $33,000 toward its $20,000 goal.

For now, the couple says they are taking the high road.

"We want to raise our son to not reciprocate hatred with hatred. We want to battle hatred with love," KC Ahlers told WTVG. "So, we obviously know somebody that did this is disturbed and we hope they get help. But, we're going to keep taking your signs down as we see them because this town doesn't need hatred. This town needs love."