Reply To: Hilchos Shmiras Haloshon

In the Chazon Ish quoted above, he specifically quotes the Chofetz Chaim in Ahavas Chesed as saying that the concept of hating apikorsum (from the halacha in the Sefer Chofetz Chaim which you quoted above) does not apply today, and we are suppposed to sustain them and even be mechalel Shabbos to save their lives.