Exactly. These propaganda parrots want us to believe these mass shootings never happened before Trump. They're as sick as the shooters.
I don't recall a single mass shooter citing President Obama as an inspiration, or quoting President Obama's words in their manifesto. Many of the mass shootings which occurred under Obama were in fact, mentally ill individuals - like the Sandy Hook shooter, and the Aurora movie theater shooting, or disgruntled employees. Only since Trump was elected and emboldened white supremacists and racists with his inflammatory rhetoric have we seen mass killers quoting the President or citing him as an inspiration.
I agree that that the number of white male rampage killings increased under Obama, but the whole racist temperature of the nation started rising considerably, when Trump started his whole birther campaign, claiming that Obama was an illegitmate President. To what extent the levels of escalating white nationalist rhetoric starting escalating in public discourse around the same time, it's hard to tell.
Nice try at "but Obama", but Trump started his Birther Campaign in 2011. Republicans said it was because Obama was "weak". If that's the case, why has it gotten worse under "strongman" Trump?