Something doesn't like X.
They assert that X causes bad thing Y. X is something of which people debate the merits, but Y is objectively bad. So by showing a link between X and Y they can translate the debatable issues with X into something no-one could argue with, Y.
They cherry pick figures for Y to show a rise associated with X. They ignore counter-examples in which other populations had a rise in Y but didn't have X, or had a rise in X with no rise in Y. They talk about "research" (stuff they Google'd for and didn't understand) and things being "obvious" and "common sense". Then, when people who understand the issues comment, they fall about on how they feel about it.
WiFi and Cancer.
Mobile phones and Cancer.
Vaccination and Autism.
Abortion and long-term mental health.
Social networks and suicide and self-harm.
Smart meters and Cancer.
Working mothers and juvenile delinquency.
Fluoride in water and unspecified bad stuff.
Folic acid enrichment of flour and the same, or different, unspecified bad stuff.
The list is endless.
In each case, a bad faith, fact-free attempt to prove a point about the former, which the complainant has unspecified feels about, by inventing an association with the latter and then wildly mis-using statistics in order to bolster the argument.
I'm never sure the proponents of such nonsense are acting in bad faith (ie, they know their argument is either wrong or at best tenuous) or genuinely believe in it. Either way, it's getting difficult to treat gently.