Let me get you some facts right
1) This thread was started by an Indian
2) Its not exactly our fans who are hyping him so much. Yes there will be hype but no one is claiming him to be an ATG or whatever. And the praise he is getting is not just from Bangladesh but others who have watched him bowl. Go to Mustafizur's page on this forum and you will see praises from Indians who actually saw him bowl rather than some internet warriors who saw some highlights or followed the score from CI.
3) Bhuv was a swing bowler, Mustafizur doesn't swing just yet but bowls at a lethal line and length. Mustafizur also bowls considerably faster than Bhuv Kumar. You need to watch a match to understand what is his real weapon is. He bowls at a good line and length, now that is a skill that does not regress with time. Maybe his cutters will be less effective with time but he will have other variations in his sleeve - just 19
4) We don't jump the gun like some of you claim. Yes we do hype our players, maybe not all of us but some of us do - and that makes us minnow mentality? You can ask a neutral about what they think about the numerous threads on this forum where the likes if Umar amin, Akmal were so much hyped in the pasts, Haris Sohail, Maqsood, Rahat, Babar Azam all get signficant amount of hype - some will be justified some will not be justified. There even is a case where razzak said Shehzad is more talented than Tendulkar. I have seen Indian fans hype their players too. But isn't that what fans will do? Why single out Bangladesh just because we are underdogs? Minnow mentality? We are still minnows despite performing so well in recent times, no need to even argue with that.
5) Its most justifiable that he will be compared to Amir. FGS OP compared him to Amir, not Wasim akram, Lillee, Hadlee, Waqar. He was compard to someone who was a freak talent at the age of 19 - so if anything fans will compare him with Amir. And Amir was not the best bowler in the world, not even close even at that time. He averaged 29 in tests, whilst Dale Steyn and Pakistan's very own Mohammad Asif had a better average.