If you worship as Christ or Allah, He will come to you as Christ or Allah. All are aspects of one Isvara or Lord. Under whatever name and form, it is Isvara who is adored. Worship goes to the Indweller, the Lord in the form. It is ignorance to think that one form is superior to another.
All forms are one and the same.
All are adoring the same Lord. The differences are only differences of names due to differences in the worshippers, but not in the object of adoration. The real Jesus or Krishna is in your own heart. He lives there for ever. He is your Indweller.