The stripping of the 2nd amendment will take time – a generation or two. I do think it will happen, what with the skill the propagandists have at their fingertips.
Mass “shootings”, ie HRDPARs, have certainly ramped up since Obummer took office.
Take these numbers at the face (fake) value. The effect is the same, however.
US Mass Shootings, 1982-2016: Data From Mother Jones’ Investigation | Mother Jones
I like the spreadsheet at the above link.