It's hard to work out which would be worse...The tiny minority of the right who may be interested in the actions you suggested, or the left in general who, if they had their way, would have prevented (and wish to prevent in future) the birth of anyone who had the possibility of having a "disability" (or was the wrong gender or potentially wrong race [1]) through their promotion of abortion on request.
As to the agitation of minority groups, I must have missed where the right were singling out minorities, rather than speaking about "American Citizens" and those in the country who were not citizens (or those outside trying to get in). Most of the singling out of minorities, separating them into groups, and trying to cause dissent between group appears to come from the left. There is a difference between trying to single out non-citizens from citizens compared to singling out, for example, Hispanics (consisting of citizens and non citizens) and "whites". True, in the first case, there may be a high percentage of a given race in the "non-citizen" component, but that race also exists in the citizen component and no complaint/issue/problem was raised regarding them.
[1] As far as I can tell from the statistics published online (not being from the US), the abortion rate among non-whites is considerably higher than whites in the US...One of the few areas where a higher "death rate" among non-whites is condoned (or even applauded) by the left. Were the "alt right" behind this, I'm sure there would be comments about them trying to ensure only those who who met the ideals of the "master race" were valued.