Please just answer the question: Why would God not allow men with crushed testicles in the temple? You are a true-believer, spiritually alive and able to understand the things of God, are you not?
Here is the answer to your question. The following is a small section from a much larger article (chapter of a book actually), the link to which I will post after the quoted material:
"To be sure, some ancient cult practices involved castration. Why would pagan devotees castrate themselves? To emulate the fertility goddesses they idolized, including Ashtoreth, Cybele, Aphrodite, Astarte, Magna Mater, Ma, and countless others --- who were all catered to by transvestite priests wanting to devote themselves in life-long commitment to, and worship of, their individual fertility goddesses. In order to do that, they wanted to make their bodies resemble, as closely as possible, the bodies of the individual goddesses they served. For these transvestite male temple cult prostitutes, there were two common castration options or practices: One practice was to break a clay pot and, from the shattered pieces, to take a shard and cut the testicles off (and sometimes the penis as well) in honor of the fertility goddess. Another way was to take the testicles and crush them in between two stones or rocks in order to render oneself a physiologic --- and, to a certain extent, an anatomic --- eunuch.
In the King James Version, Deuteronomy 23:1 is rendered, "He who is wounded in the stones ["stones" meant "testicles" in old English] or has his privy member cut off ["privy member" here refers to "private member" or "penis"] shall not enter into the congregation of the LORD." Well, taken out of context, that is mighty strong language, as well as very puzzling relative to modern-day applicability. For example, there have been football accidents where a player has actually had to have both testicles removed because of damage sustained during the accident. Does that mean, based on the Law, that he should not be a part of the congregation of the Lord? No, again I say, the Law needs to be considered in the literary and historical contexts in which it has been written. The reason that God did not want people who had their penises cut off, or testes crushed or removed, to enter into His congregation was because such mutilation was commonly done in honor of pagan fertility goddesses. They were tokens of personal commitment and covenant vows made by pagan people to their idols. This disgusted God, --- as it should disgust God! It was, and is, detestable (i.e., abominable) to Him. God could spew people out because of that particular activity, because, though unknown to most of its practitioners, it sought to bring honor to the Devil himself.
Concerning the damaged testicles referred to in Deuteronomy 23:1, there is a slightly different reference relative to blemishes in general in Leviticus 21:17-20:
The LORD said to Moses, "Say to Aaron: 'For the generations to come none of your descendants who has a defect may come near to offer the food of his God. No man who has any defect may come near: no man who is blind or lame, disfigured or deformed; no man with a crippled foot or hand, or who is hunchbacked or dwarfed, or who has any eye defect, or who has festering or running sores or damaged testicles.'" NIV
Doesn't that sound somewhat strange to you? In terms of contemporary society and the understanding the Lord Jesus has brought through His Holy Spirit, you know that the Lord God Almighty would not prevent a dwarf from approaching Him in prayer or keep him from salvation. Why did it matter in ancient times? Because the Lord God Almighty was trying to convey to quite unsophisticated people that He is worthy of unblemished individuals and perfect sacrifices. He did not mean that He was rejecting these people forever, just that they were not to serve in priestly roles if they were disabled or disfigured. So, even though Leviticus 21:20 and Deuteronomy 23:1 both include eunuchs, Deuteronomy 23:1 is really speaking of those who have self-mutilated in order to honor fertility goddesses and Leviticus 21:20 is speaking about those of His congregation who were "blemished" accidentally or congenitally. To be sure, at that time the Lord was trying to convey that He is worthy of perfect sacrifices, the embodiment of which would be later found in the sacrifice of Christ Jesus."
Chapter Three: Levitical Law and Grace