Never be ashamed of the Gospel of Christ
There’s is never a need to be ashamed of the Gospel of Christ. Believing in God is believing in the truth.
And when they naysayers come looking for a fight and wanting to ask ignorant questions like, “Where’s your proof?” just know that they have already lost hope in life because even science can not provide the “proof” they are looking for and it never will.
Instead just laugh it off and be the light, you don’t need to convince them of anything.
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believes; to the Jew first, and also to the Greek.
Romans 1:16 KJV