As a European who probably agrees with you regarding many policies: You may be able to argue that quality of life is better in Europe or with European-style policies [1]. Everyone having health insurance and less of a need to worry about your basics needs met are fair points. I wouldn't want to live in a society that doesn't seem to care that much about economic equality.
But "about to be ruled by a fascist"? Trump lost the election. Sure the diverging right is worrying, but is the country "about to be ruled" by a fascist?
And "getting shot at school/street" is pretty much just a cheap shot.
I haven't been to the U.S., but I'm willing to wager that for most Americans getting shot is not a primary concern. I'm not saying shootings don't happen or that they aren't tragic, because they do and they are, or that the U.S. don't have a problem. But when they do happen, they obviously get so much visibility and attention that their emotional effect is greater than their actual chances of affecting you in your life, in a way that's not entirely dissimilar to terrorist attacks.
That makes appealing to shootings a populist-style emotional argument: easy to throw around and force people's attention with, not entirely truthful, and much more work to argue against than the argument would substantially warrant. That also makes it pretty annoying and bothersome.
So, I kind of get why people might not like your argumentation style.
[1] Although both Europe and the U.S. are diverse enough that it's going to get tricky; I'm not sure there is such a homogenous thing as "Europe" when it comes to quality of life. But that's a digression.