Sure I can. Judaism isn’t all or nothing. They may not be practicing Judaism in the best way, or the most consistent way, or the most halachically ideal way (or whatever other epithet you like), but Judaism is still Judaism and even if they reject parts of it, that doesn’t negate the fact that they’re still practicing in some way. What are they, Mormons?
The only people who call themselves practicing Jews who really, truly aren’t, are Hebrew Christians (so-called “Messianic Jews”).