After converting from Islam to Hinduism, this person's mind has gone crazy

Let's hear a ex-muslim claim and see how much ignorant he is— That man convert from islam to hinduism....from pure monotheism to polytheism and pantheism.. And he can't even bear the truth with his heart.. Now we can see that that man wasn't a practice Muslim either and He doesn’t Know about islam much,as a normal muslim should be,when he was he should have study about islam...