It is not reasonable to ask those questions. If croc and bird were not similar, but croc and horse were similar, you can ask the same question.
If God was all powerful he could have simply made everything not similar. It is not just that birds are crocodiles are genetically related, it is also backed up by the fossil evidence and modern taxonomy. If crocodiles and horses were genetically similar but severely contradicted the fossil evidence we would all be like

. Your comparison is not reasonable.
You can not separate creation from God. God makes croc and bird similar in a certain way. That is it. We simply discovered that they are similar and be amazed by the way things are created.
Why would he make birds and crocodiles related when he could just as easily made them totally unrelated? Birds have such a totally different design from crocodiles yet the fossil evidence and genetic evidence suggests they had a common ancestor (via EVOLUTION). You claimed that similarly designed animals should have similar genes. So far every study has concluded that crocodiles are more closely related to birds. It seems to me that have uncommon designs and common genes, why?
Again, this extended reasoning is based on the hypothesis that they are similar. We do not really know. My genetic questions are not satisfied yet.
Five studies are not enough?
Why were these researches performed? Because paleontologist suggested that croc and bird share common ancestor.
No, most were trying to see if the Homeotherma hypothesis was correct. The Homeotherma hypothesis was that mammals and birds were sister clades.
So, these people took samples from croc and from bird, and tried to find evidences for that, so we can have genetic evidences to support paleontological suggestions.
They took random gene sequences and compared them.
Noticed what are the general type of conclusion: they all said: croc shared these genes with bird but not with lizard. But none of them said: croc share that genes with lizard but not with bird.
They would have mentioned if crocodiles shared any genes with lizards but not with birds. In fact, one study specifically compared a crocodilian with a lizard...
The mitochondrial genomes of the iguana (Iguana iguana) and the caiman (Caiman crocodylus): implications for amniote phylogeny.
Did you just accidentally ignore that study?
I raised this question. But Split Rock boldly deny the possibility. The denial is totally unfounded.
Well the above study never mentioned any such phenomena.
So, in simply logic, these articles say: A so B. But they did not say B so A. So the sharing of gene between croc and bird "suggests" their relationship. But it does not exclude a similar relationship, which might exist between croc and lizard.
They suggested A is more similar to B. B is not more similar to C. It doesn't exclude a similar relationship between crocodiles and lizards, that is why most of the studies used gene sequences from several different animals.
Now, has anyone tried to do the same to croc and lizard? I don't believe so. Why? Because there is no point to do that (hard to get $ support) since paleontologist has already concluded that they are not as closely related.
Yes. Here it is again...
The mitochondrial genomes of the iguana (Iguana iguana) and the caiman (Caiman crocodylus): implications for amniote phylogeny.
Phylogenetic analyses of 2889 amino-acid sites from 35 mitochondrial genomes supported the bird-crocodile relationship.
Are you going to retract your statement?
That is why I said this type of argument is backward. What if people started to compare genes of croc and lizard seriously?
They did. We have the mitochondrial genomes of iguanas, anoles, green lacertas, and a few others.
I believe there could be more than 10 articles that show they share some DNAs (or whatever) but were not the case between croc and bird. What would be the conclusion then?
So are you saying that maternal relationships based on the mitochondrial DNA are flawed as well? It is one method they use for parental testing. If we throw these studies out the window then we should stop parental testing based on the same methods.
In general, genetic arguments made to support paleontological suggests are partial and prejudiced. They use other people's conclusions, and try to find evidence to support the conclusion.
Are you accusing the scientists of falsifying evidence?
I am not saying this is not a scientific method. Basically creationists are doing the same thing.
Except if scientists are wrong they change the way they think. Creationists "know" they will never be wrong.
The critical problem is where does the conclusion come from at the first place.
Scientists use independent studies to provide more evidence to support or reject hypotheses. Pangolins used to be in Edenta. Now they are in their own order Pholidota and are closely related to carnivores. That is an example of how traditional taxonomy is changed due to more accurate molecular/genetic relationships.