Fasting only on the 10th of Muharram

Q: Some people say that it is not makrooh to fast only on Ashura, the tenth of Muharram, because it is no longer the practice of the jews in today's times. Rasulullah (Sallallahu Alayhi Wasallam) mentioned in the Hadith that we should not only fast on the tenth as we will be resembling the jews. Since the jews no longer fast on the tenth of Muharram, it will no longer be makrooh for Muslims to only fast on the tenth. Furthermore, they cite the following quotation of Badaai'-us-Sanaai' in support of this claim. Is this view correct? If not, then what is the correct explanation of the following quotation?

وكره بعضهم صوم يوم عاشوراء وحده لمكان التشبه باليهود، ولم يكرهه عامتهم

Leaving one's pregnant wife to perform nafl hajj

Q: My husband did hajj last year. I am pregnant and I have 2 little children. His parents who are fit and fine are going for hajj this year with his friends and family who said to take care of them. But in india no 1 is ready to take care of me and my children as the doctor suggested that I should rest. He is taking a business visa and going for hajj. Is it permissible?

Performing jumuah salaah with the intention of nafl and thereafter leading the jumuah salaah elswhere

Q: Omar participated in Jummah khutbah and prayed Jummah Salah behind a Imam with the intention of nafl in masjid A and then delvired a khutbah and lead Jummah Salah on the same day in another masjid B, is the Jummah Salah of Omar and the congregation in masjid B valid and is this permissible?

Making the intention of nafl hajj

Q: Last year I had gone for hajj with my family (mother and wife). Before leaving for hajj (during it's preparation) I had made my wife owner of the amount which was to be spent on her for hajj (Rs.2.5 lakh). During the journey I instructed her to make niyat for Fardh Hajj as she was made owner of money. But by mistake she made niyat for Nafl Hajj and completed the Hajj journey. I would like to ask whether the Hajj she did would be counted as Fardh or Nafl. If Nafl, does she have to do Fardh Hajj now again. At present neither me nor she has any money. She has only her jewellery. If ruling is for Fardh Hajj and either me or she dies before doing it, then what happens. I would like to make it clear it was 1st Hajj for myself and wife.