If Ramadan is the only time someone goes to the masjid, prays, wears hijab, stops drinking/smoking, doesn’t party, reads Quran…. etc. then good for them. Don’t talk about them, don’t call them fake and don’t use the god awful term “Ramadan Muslims” to describe them because for all you know during that one month of the year they may be 10 times sincere and pious than you are all year around. Remember that ignorance was Shaytan’s downfall.