I can’t find the graph this statement is referring to
“As you can see, when acetaminophen use tapers off, the autism rates decrease:”
Which is it?
Vaccines cause Autism.
Excellent study by @stkirsch https://stevekirsch.substack.com/p/vaccines-cause-autism 
Discussion
I believe the claim is that the combination of acetaminophen plus vaccination leads to the worst autism outcomes.
Doctors have since become more aware of this connection, and don’t prescribe the former as often, though the latter is still basically ubiquitous and mandatory for all kids entering public schools