There are three issues(?), which a Non Hindu uses to pick on Lord Krishna and uses them to discredit Hinduism and Lord Krishna.
1.Lord Krishna was with many a woman for pleasure,Rasa Kreeda,
2.Lord Krishna had 16,000 wives and
3.Lord Krishna won the Mahabharata War by unfair means and he advocated killing.
Krishna himself answers to His ways in the conduct of the Mahabharata War in Bhagavad Gita.( if one can understand what He says, for it is very subtle)
On his 16000 wives I shall be posting an article.
Rajasa Kreeda, Being with Many women.