I've been comissioned
by Donald Trump to prove this.
Made him pay up front.

Let's review the basics.

Adolph was 56 years old when he died.
Each person makes 0.5 to 1.5 liters of farts per day.
Adolph was a vegetarian (so I've heard) so we can figure at the upper average limit of 1.5 liters per day.
56x365x1.5 = 30660 L of flatus. Mostly nitrogen, methane, and hydrogen, with a few sulfides and amides for that wonderful fart stink.
That's approximately 7.5x10^26 molecules distributed throughout the atmosphere.
The earth's atmosphere has a volume of 1.4x10^21 L.
The # of Hitler fart molecules you breathe in with each breath is...
(0.5 L) / (1.4x10^21 L) *(7.5x10^26) = 270,000 molecules.
Have a nice day!