You're asking when did this happen: "the left dismantling the shadow right"
here, when the IRS under Obama discriminated against conservative and Christian groups for applications for tax exempt status
> The consent order says the IRS admits it wrongly used "heightened scrutiny and inordinate delays" and demanded unnecessary information as it reviewed applications for tax-exempt status. The order says, "For such treatment, the IRS expresses its sincere apology."
https://www.npr.org/2017/10/27/560308997/irs-apologizes-for-...
Is that specific enough for you?