We sympathies with Arab Christians more than you think, it is the interference of the Christian church in the Muslim lands where they live with the excuse of protecting them that is in question, and it is not only that, it is using them to create chaos and problems in some Arab countries many time, like in the Lebanese civil war which lasted for two decades and where most Christian militias got help from Usrael and handed much information about the Muslim militias and mostly the Palestinians, I do not know if you still remember the massacre of Sabra and Chatila by the Usraeli troops led by Sharon under the watchful eye of the Lebanese Christian militias.
The Christians have lived peacefully within the Muslim world for a very long time as full citizens of their counties of origin, so when and outside entity like the Vatican or others try to formant trouble and uses the Christians in that aim, the Muslim the countries reaction is against that , which is considered as a foreign intervention in internal affairs of sovereign nations.
Arming the Christians to defend themselves when the state fails to protect them is obviously a good idea, but you should understand that their misfortune is shared by the Muslims who can not defend themselves either and they are the majority, be it in death, pain or victimization.
So, arming them should be left to the state where they live not foreigners, 'cause in the latter case they will e seen as foreign entities and will be targeted as such, which will be bad for them and worsen their situation.
You should at least have some human sympathy for those "Gaza moving corpses" that are paraded under your noses, they are mostly (80%) civilians., and a big percentage of that are children, women and elderly people.
We know that you show no sympathy for Muslims whatsoever, the crusades are a historical testimony to that, where Christian crusaders had as they have said Muslim civilian's blood up till their knees, or the inquisition in Spain when hundreds of thousands of Muslims were slaughtered and beheaded. But ultimately the Muslims survived and won. In the first case they have liberated Jerusalam, and had all three faiths to live in it, in the second case Spain was Christian only by name since Islam went into everyone of their walks of life and today they have recognized it.