NO !! they could claim that of Jesus also eg .,
Mt 13:58 And he did not many mighty works there because of their unbelief.
and believe me ,there is much unbelief in the world today; even so an example .. my father was healed of cancer even before becoming a Christian; this is what caused him to come ,be baptised and receive the Holy Spirit (with the bible evidence of speaking in tongues as Jesus said believers would ); he had to admit there was something REAL going on !! so he came to find out !!