Though BJP is having majority in Lok Sabha, it is not able to bring bills as per its manifesto and not able to carry on with its development agenda, because it does not have the needed majority in Rajya Sabha. So it needs as much seats possible from those states now going for election, even though they may not get the majority to form governments.
In the four southern states, BJP could form government only in Karnataka. Now even that is not there. So BJP is mainly seen as a North based party and mainly in the central North comprising a few states.
A foray into Kerala will not only boost its morale and image across the nation, but will also make people believe that a viable alternative has arrived to choose away from the same old LDF and UDF. That can place the party in its winning bid in the next chance. Just like TN, in Kerala the rule is alternated between the two formations UDF and LDF. So, people have to necessarily choose one. Till now BJP did not show any semblance of its readiness and equip to be eligible to give a credible challenge. But the last Lok Sabha elections threw indications that if BJP can show good,efficient leaders and a well oiled party machinery, then they can come very close to victory and can become second in many constituencies pushing the LDF or UDF behind them. Even a symbolic victory of one seat or coming second in at least 50 constituencies will catapult them to victory in the next chance. That only can make people repose trust in them as a probable winner. That is why BJP takes it very serious now, as now or never.
The appeasement politics and corruption and nepotism has disheartened the people, especially the youth. But they do not have another trustable horse to bet on. That is what BJP is now trying to become. How far they will be successful can be known only in the third week of May.