Liam Cox, author of the impassioned Facebook post, said that while he lived in one of the worst affected areas hit by rainstorms, people should think of the tragedies striking thousands across the globe, too.
"I live in Hebden Bridge, Yorkshire," he admitted - a place which was devastated in the days after Christmas.
"It's shit - everything has gotten really wet."
But Cox went on to remind his Facebook friends of devastation on a very different scale befalling human beings around the world.
"I'm alive," he wrote. "I'm safe.
"My family are safe. We don't live in fear. I'm free.
"There aren't bullets flying about. There aren't bombs going off. I'm not being forced to flee my home and I'm not being shunned by the richest countries in the world or criticised by its residents.
He continued: "All you morons vomiting your xenophobia on here about how money should only be spent 'on our own' need to look at yourselves closely in the mirror.
"I request you ask yourselves a very important question... 'Am I a decent and honourable human being?' because home isn't just the UK, home is everywhere on this planet”.
Cox added that people should "start looking outwards rather than inwards" and called on those angered at the low levels of funding being provided to bolster the relief effort to turn their frustration to the government.
"Rather than condemn a kind gesture by a man who's entitled to do what he wants with his own money, why don't you DEMAND that your government donate the costs of a single British missile to the flood victims?" he asked.