....let's see what the actual numbers tell us....
Tear gas use, 2012-2018
2012 26
2013 27
2014 15
2015 8
2016 3
2017 18
2018 29
Source: DHS figures
Interesting. Trump seems to really like tear gassing. He used tear gas 29 times in 2018 (and the year ain't done yet), more than ANYTIME during the Obama years. Moreover, Obama drove illegal border crossings to a record low in 2016. That is likely reflected in the number of uses of tear gas. There seems to have been little need for tear gassing as of 1/20/17.
Much like inheriting a good economy, Trump inherited illegal border crossings at a 25 year low. So, why Mr. Trump are gassings up 6X in your first year of the Presidency? Perhaps its the same reason that you have no problem yanking children from the arms of the moms and dads.
Aside from displaying your innate cruelty and overt bigotry, perhaps to put on a show for your too bigoted base, there seems to be no explanation.
https://www.factcheck.org/2018/06/illegal-immigration-statistics/
Yet another cosmic "What about Obama?" fail
PS - You are a despicable human being, Mr. Trump.