I think the problem isn’t that the IRS looked into conservative political non-profits, but that they didn’t look into ALL political non-profits and PACs and Super-PACs for tax fraud.  There’s fine line between all these organization’s activities and illegal campaign finance and tax violations.  Some of these organizations, especially the Super-PACs, seem to exploit their non-for-profit status, which is something the IRS is charged with investigating.  After the SCOTUS Citizen’s United decision, it was inevitable that the IRS would have to look out for non-for-profit status abuses by political organization.  The issue is not that they did so, but that they did so unevenly, IMHO.