I wouldn’t even ask him in an emergency.
I don’t know who this particular rabbi is, but I’ve heard of people who call themselves rabbis who are mattir obvious issurim.
One example is toloiom. Some rabbis permit eating salads in a non kosher seting. They probably never learned hilchos toloim, and/ or don’t keep up to date and don’t know that leafy vegetables need checking by a mashgiach.
Another is bishul akum. People aren’t aware that things like pasta and eggs are assur if cooked by a non Jew (eggs are actually mentioned explicitly in Shulchan Aruch Yoreh Deah 113,14) as being subject to bishul akum.