My first question was (Not praying in masjid when imam is a government paid employee?). I want to add some more in it. They did not say Dua after salat by raising their hands. I asked them why you are not doing Dua. They said Salat is Dua, Muhammad (Peace Be Upon Him) did not did this kind of act. If you want to make Dua, then you should make Dua when you are in Sajda in prayer or in any state but you should be in prayer. The Dua after salat is not valid, and group Dua is also wrong, according to them. So is it true that Dua after prayer is not valid act?
Someone once asked Prophet Muhammad (s) when is the time to make dua:
“the Prophet, salAllahu alayhi wasalam, was asked “which Du’a is more heard (by Allah)?” The Prophet, salAllahu alayhi wasalam, said, “The Du’a during the last part of the night and after the Fard prayers.”
Also, Prophet Muhammad (PBUH) used to recite Qunoot after second rakah, which is also the dua (supplication).
Once Prophet Muhammad (pbuh) was asked what is the best time to say dua:
Narrated Sahel Ibn Sa'ad (RA): that the Messenger of Allah (SAW) said: 'Two will not be rejected, Supplication when the Adhan (call of prayer) is being called, and at the time of the rain'. [Al-Hakim 2: 114, and Abu Dawud #2540, ibn Majah]
Hence it proves that you can make dua at anytime, Almighty is all hearing and listens to our queries everytime.